Error calling native methods

HI
I declared a static native method in a class and using the System.loadLibrary() method i load the dll.
Now if i want to call the method from another class using instance of that class where i declare the native method, it shows an error
java.lang.SpecifiedPathLink error. I have put the dll outside the package in the same directory.
can anyone help me regarding this problem

it shows this exception
Exception in thread "main" java.lang.UnsatisfiedLinkError: no PerfMonitor in jav
a.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1491)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:834)
at C3.CPUMemoryUsage.<clinit>(CPUMemoryUsage.java:6)
at C3.Node.main(Node.java:18)

Similar Messages

Error call JNI method

In call native method print in sign applet got following error:
java.lang.UnsatisfiedLinkError: LabelPrinter.print Possible causes: If you are trying to use J/Direct (@dll.import), check your compiler version (for JVC, requires 4336 or greater.) If you are trying to use RNI, there are new requirements: see documentation.
at LabelPrinter.print (LabelPrinter.java)
at LabelPrinter.start (LabelPrinter.java:110)
at com/ms/applet/AppletPanel.securedCall0 (AppletPanel.java)
at com/ms/applet/AppletPanel.securedCall (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.run (AppletPanel.java)
at java/lang/Thread.run (Thread.java)
I not using J/Direct or RNI.
Any ideas?
Thanks
Carlo Cerqueira

This could be a matter of incorrect case in the Method or library you are calling out to - or it could be that the DLL is not found - are you specifying the full path to it on the client system?

FATAL ERROR in native method

Dear all,
I am working on a MacOSX. I am having trouble in using a Dynamic Library generated from C files and accessed from a java project using JNI.
The loading of the library work well bur when i try to access a method I have the following error:
FATAL ERROR in native method: JNI received a class argument that is not a class
     at cytosolve.sbmlSolver.SBMLSolver.initSolver(Native Method)
     at cytosolve.sbmlSolver.SBMLSolver.<init>(SBMLSolver.java:87)
     at cytosolve.sbmlSolver.cytosolve.main(cytosolve.java:29)where the Native method inside the C file is the following:
JNIEXPORT jint JNICALL
Java_cytosolve_sbmlSolver_SBMLSolver_initSolver(JNIEnv *env, jobject obj, jstring model_filename, jdouble totalTime, jint numSteps)and it is called from the Java file as:
int successCode = initSolver(model_filename, totalTime, numSteps);Do you have any idea on where is the problem and how to fix it?
Thank you,
Eva.

Everything seems to be right. Maybe you use JNI functions inproperly?

FATAL ERROR in native method: Wrong Method ID

I have a piece of C code from which I am trying to launch a piece of Java, but I am having severe problems just trying to get a simple integer value returned from any Java function. I keep getting the error message "FATAL ERROR in native method: Wrong method ID used to invode a Java method"
My C code looks like :
JNIEnv *env;
long result;
jmethodID mid;
jclass cls;
jobjectArray args;
jstring jstr;
jint res;
jobject myObj;
options[0].optionString = "-Djava.class.path=.";
options[1].optionString = "-Djava.compiler=NONE";
options[2].optionString = "-verbose:jni";
vm_args.version = JNI_VERSION_1_2;
vm_args.options = options;
vm_args.nOptions = 2;
vm_args.ignoreUnrecognized = JNI_FALSE;
// Create the Java VM
result = JNI_CreateJavaVM(&jvm,(void **)&env, &vm_args);
if (result == JNI_ERR )
printf("Can't create Java VM\n");
exit(1);
else
printf("Java VM created successfully\n");
cls = (*env)->FindClass(env, "Example1");
if (cls == 0){
printf("Can't find Class\n");
exit(1);
else
printf("Class Found\n");
mid = (*env)->GetMethodID(env, cls, "GetIntValue", "()I" );
if (mid == 0) {
printf("Can't find function\n");
exit(1);
else
printf("Function Found\n");
res = (*env)->CallIntMethod(env, cls, mid);
if (res != 0)
char pszTempString[256] = {'\0'};
sprintf (pszJavaString, "Returned from Java the value of %d", res);
printf("Returned from Java with ");
printf(pszJavaString);
My GetMethodID call works correctly and I have checked the signature (using javap -s) and that works fine. I've seen many references on these forums about using NewObject prior to calling CallIntMethod, but if I try to use that I then get the error message "FATAL ERROR in native method: a non-constructor passed to NewObject".
Any body got any ideas please.
Thanks

What I couldn't figure out from your code is where you create the java object that is supposed to return the integer to your C code.
Alternatives:
o This is just code snippets, and you really are creating the object.
o Error - the object should have been created.
o Error - it is a static method, and you should be finding a static method and calling it on a class object.
(Other than that, I didn't see anything obviously wrong.

FATAL ERROR in native method: Wrong method ID used to invoke a Java method

When calling the same method second time , I get message ::
<FATAL ERROR in native method: Wrong method ID used to invoke a Java method>
void myFunction(int myVal)
JNIEnv *env = NULL;
jclass odbcconnls;
jint res;
printf("\nInitilaizing class ");
res = (jvm)->AttachCurrentThread((void **)&env,NULL);
if (res < 0) {
fprintf(stderr, "Can't get Env \n");
(jvm)->DestroyJavaVM();
return SQL_ERROR;
if(res == JNI_OK)
printf("\nThe env is initialized ");
if(*(&env) == NULL)
printf(" the env is NULL ");
printf("\nenv :::::: %s ", env);
// the jobject (dbc->actualConn) is a global reference
odbcconnls = (env)->GetObjectClass(dbc->actualConn);
if (odbcconnls == NULL) {
goto destroy;
switch(myVal){
case 1:
jmethodID methodId ;
jboolean jbool;
SQLINTEGER Val = (SQLINTEGER )Value;
SQLINTEGER val1 = *Val;
methodId = (env)->GetMethodID( odbcconnls,"myFun1","(Z)V");
if(methodId == NULL){
goto destroy;
if(val1 == SQL_FALSE )
jbool = 0;
else
jbool =1;
env->CallVoidMethod(dbc->actualConn,methodId,jbool);
env->DeleteLocalRef((jobject)res);
env->DeleteLocalRef((jobject)odbcconnls);
env->DeleteLocalRef((jobject)methodId);
jvm->DetachCurrentThread();
return ;
case 2 :
jmethodID methodId1 ;
SQLUINTEGER* Level;
methodId1 = (env)->GetMethodID( odbcconnls,"myFun2","(I)V");
if(methodId1 == NULL){
goto destroy;
Level = (SQLUINTEGER *)Value;
env->CallVoidMethod(dbc->actualConn,methodId1,(int)*Level);
dbc->txn_isolation = (SQLUINTEGER)Value;
env->DeleteLocalRef((jobject)res);
env->DeleteLocalRef((jobject)odbcconnls);
env->DeleteLocalRef((jobject)methodId1);
jvm->DetachCurrentThread();
return ;
case 3 :
SQLCHAR* Cate;
jmethodID methodId2 ;
jstring jStrCat;
methodId2 = (env)->GetMethodID(odbcconnls,"myFun3","(Ljava/lang/String;)V");
if(methodId2 == NULL){
goto destroy;
Cate = new SQLCHAR[20];
strcpy((char *)CCatalog,(char *)Value);
jStrCat = env->NewStringUTF((char *) Cate);
printf("\n got jSTring ");
env->CallVoidMethod(dbc->actualConn,methodId2,jStrCat);
printf("\n after called method ");
int len = strlen((char *)Cate);
dbc->Cate = new SQLCHAR[len+1];
strcpy((char *)dbc->Cate,(char *)Cate);
printf("\n copied result ");
env->DeleteLocalRef((jobject)res);
env->DeleteLocalRef((jobject)odbcconnls);
env->DeleteLocalRef((jobject)methodId2);
jvm->DetachCurrentThread();
return ;
destroy:
if ((env)->ExceptionOccurred()) {
(env)->ExceptionDescribe();
jvm->DetachCurrentThread();
(jvm)->DestroyJavaVM();
return SQL_ERROR;
When case 1 is called second time this error is thrown..
plz help me..
Thanx
MittalSunita.

When calling the same method second time , I get
message ::
<FATAL ERROR in native method: Wrong method ID used
d to invoke a Java method>
void myFunction(int myVal)
JNIEnv *env = NULL;
jclass odbcconnls;
jint res;
printf("\nInitilaizing class ");
res = (jvm)->AttachCurrentThread((void **)&env,NULL);
if (res < 0) {
fprintf(stderr, "Can't get Env \n");
(jvm)->DestroyJavaVM();
return SQL_ERROR;
if(res == JNI_OK)
printf("\nThe env is initialized ");
if(*(&env) == NULL)
printf(" the env is NULL ");
printf("\nenv :::::: %s ", env);
// the jobject (dbc->actualConn) is a global
reference
odbcconnls = (env)->GetObjectClass(dbc->actualConn);
if (odbcconnls == NULL) {
goto destroy;
switch(myVal){
case 1:
jmethodID methodId ;
jboolean jbool;
SQLINTEGER Val = (SQLINTEGER )Value;
SQLINTEGER val1 = *Val;
methodId = (env)->GetMethodID(
( odbcconnls,"myFun1","(Z)V");
if(methodId == NULL){
goto destroy;
if(val1 == SQL_FALSE )
jbool = 0;
else
jbool =1;
env->CallVoidMethod(dbc->actualConn,methodId,jbool);
env->DeleteLocalRef((jobject)res);
env->DeleteLocalRef((jobject)odbcconnls);
env->DeleteLocalRef((jobject)methodId);
jvm->DetachCurrentThread();
return ;Why do you delete a local reference???
Did you ever call the get local reference?
case 2 :
jmethodID methodId1 ;
SQLUINTEGER* Level;
methodId1 = (env)->GetMethodID(
( odbcconnls,"myFun2","(I)V");
if(methodId1 == NULL){
goto destroy;
Level = (SQLUINTEGER *)Value;
env->CallVoidMethod(dbc->actualConn,methodId1,(int)*Le
el);
dbc->txn_isolation = (SQLUINTEGER)Value;
env->DeleteLocalRef((jobject)res);
env->DeleteLocalRef((jobject)odbcconnls);
env->DeleteLocalRef((jobject)methodId1);
jvm->DetachCurrentThread();
return ;
case 3 :
SQLCHAR* Cate;
jmethodID methodId2 ;
jstring jStrCat;
methodId2 =
(env)->GetMethodID(odbcconnls,"myFun3","(Ljava/lang/St
ing;)V");
if(methodId2 == NULL){
goto destroy;
Cate = new SQLCHAR[20];
strcpy((char *)CCatalog,(char *)Value);
jStrCat = env->NewStringUTF((char *) Cate);
printf("\n got jSTring ");
env->CallVoidMethod(dbc->actualConn,methodId2,jStrCat)
printf("\n after called method ");
int len = strlen((char *)Cate);
dbc->Cate = new SQLCHAR[len+1];
strcpy((char *)dbc->Cate,(char *)Cate);
printf("\n copied result ");
env->DeleteLocalRef((jobject)res);
env->DeleteLocalRef((jobject)odbcconnls);
env->DeleteLocalRef((jobject)methodId2);
jvm->DetachCurrentThread();
return ;
destroy:
if ((env)->ExceptionOccurred()) {
(env)->ExceptionDescribe();
jvm->DetachCurrentThread();
(jvm)->DestroyJavaVM();
return SQL_ERROR;
When case 1 is called second time this error is
thrown..
plz help me..
Thanx
MittalSunita.

Calling native methods in a package

Hi!
We have a problem when calling native methods in a class which is in a package. As you can see from the code below we have a class making an instance of a class<testBando> which makes a instance of another class<Bando> which contains the native methods. When running the program we get the error:
Exception in thread "main" java.lang.UnsatisfiedLinkError: initialize
at test2.Bando.initialize(Native Method)
at test.testBando.<init>(testBando.java:10)
at Main.main(Main.java:5)
When we take the class that calls the native methods out of any package every thing works fine! Can you not call native methods inside a package or what are we doing wrong?
// testBando.java
package test;
import test2.*;
public class testBando {
Bando b;
public testBando() {
     b = new Bando();
     b.initialize();
// Bando.java
package test2;
public class Bando {
public native void initialize();
static {
     System.loadLibrary("bando");
// Main.java
import test.*;
public class Main {
public static void main(String[] args) {
     new testBando();

I suspect that your problem is that you have not
regenerated the signature when you placed the native
method's object in a package. Or same result but different sourc:
-package name was changed and it wasn't regen'd
-javah was run incorrectly (which gens the signatures with no package name.)

Error calling a method of the tree control in BDC

I'm connecting two systems Iplan(project management tool) with SAP PS using SAP XI.
I've written an BDC(RFC) to assign people for the activity in an project(cj20n) it works fine in the foreground. But it doesn't work in the background.It doesn't give me error also.I've sap all authorization.
When I connect with XI its throwing me an error "Error calling a method of the tree control" message type A (using the same user to connect r3). I believe something we should do prior handling the tree control in a BDC. IF any body come across this situation please let me know. your help is appreciated.
Regards
Anand

BDCs over enjoy transactions do not get along together. The containers and controls is more of a gui thing, and in background sometimes the BDC has a hard time with them. I would suggest using the non-enjoy tcode instead, CJ20.
Regards,
Rich Heilman

Job is failing with the following error- Error calling a method of the tree

dear SDNers,
my question is where do i need to look for error.
Will this be an ABAP issue?
Please guide
DETAILS
In SM37 when we see the job XYZ, we get the following details.
   Job                              Ln    Job CreatedB    Status          Start date     Start time      Duration(sec.)     Delay (sec.)
XYZ                                                                    Canceled        16.11.2009    10:11:30                  9                         27
When the job log is checked this , we get the below details.
The job XYZ is failing with the following error.
Date      Time     Class No.   Message
+----
+----
2009/11/16 05:03:01 | 00     516 | Job started
2009/11/16 05:03:01 | 00     550 | Step 001 started (program RBDMON00, variant
SBCI287, user ID ABCDEF)
2009/11/16 05:03:03 | TREE_C 000 | Error calling a method of the tree control
2009/11/16 05:03:03 | 00     518 | Job cancelled
Equest your assistance in knowing where to find the error for this.
I have no clue as to where and how i need to debug or where i should i be looking for error.
In BD87, the selection screen paramters that are given are changed on date (from and to) and IDOC status 51,66,69 and 64 and the message type is "Öutbound interface of picked shipments"
Please guide.
Regards,
SuryaD.
Edited by: SuryaD on Nov 23, 2009 5:36 PM
Edited by: SuryaD on Nov 23, 2009 11:14 PM

> 1. There is a job name ABCDEF
> 2. When this job is run then the status shows cancelled and the job error log shows tHe details that "error calling a method of the tree control"
> 3.ThIs error also points fingers to /link to BD87 as seen in the job log " (program RBDMON00, variant \SBCI287, user ID KRISF)"
>
BD87 is an IDOC processing.
> My question to you Sampath.
>
> in order to answer your question on whether it is ALv or SALV.. please tell me as to how will i know which progrm is associated with the job ABCDEF?
>
Go to sm37 - double click on the job that was failed - Click on Step (on application tool bar) to get the program name - double click on the program name - new popup will be opened - then copy the program and variant
Go to se38 - enter the program - execute (F8) - choose the variant that is there in the background job - run in forground first
if the run is good - then check the program - SE38 - Display the program then see
I just saw the above message BD87... .if that is true, you dont have to do all these
I dont think it is possible to schedule a job with BD87. Is this the first time or is any job completed without errors for this?

Forte debugger exits (FATAL ERROR in native method: JDWP "util.c")

When debugging my GUI app in Forte on Solaris 8, my debug session exits with the following error:
FATAL ERROR in native method: JDWP "util.c" (Feb 20 2002), line 1029: Unexpected error, error code = 113 (JVMDI_ERROR_INTERNAL)
It seems to do so while in the middle of a comm api routine where I'm accessing the serial port. Has anyone else ever seen this error is Solaris? I have all of the patches required by Sun for JDK1.3.1_02 installed with the same version of the JDK.
The application runs fine when I run it standalone...
Any suggestions?
Thanks.

I've had the same problem. It appears that it occures when an error is thrown that stop a JSP page load.
Everything will run find up to that point, but after that, the util.c error will not go away except by deinstall and reinstall of Forte. We can't even use Forte at this point since it will start throwing the error within 1 hour of reinstall. Crap.
I'm on Windows XP also, and this happens with JVM 1.3 or 1.4.

ERROR_WAIT_NO_CHILDREN error while native method calling

I have some self-made DLL and call it from Java over JNI.
Under 100% repeatable conditions, the calling of the native method conduce to
java.exe(JVM) termination with errorlevel 128L. Without any trace or reports.
If to assume, that java.exe uses OS error codes, then 128L is
'ERROR_WAIT_NO_CHILDREN - There are no child processes to wait for.'
What that? JVM crashed by the Dll?
Some additional information:
I found the position(approximately) in C code where the execution is stopping.
It far from JNI/C function declaration.
Dll is compiled by Watcom C/C++32 Compiler and Linker, Version 11.0.
I tried to compile Dll by Borland C++ 5.5.1 free command-line compiler, and error
disappears. But I don't think it right way to refer the error to compiler.
And something else. Native code work fine, if it was called not from Java but
from native application.
Any ideas?
Thanks.

Hmm, could You send the header of the method from Your
DLL which you are calling from Java?Sure.
JNIEXPORT jint JNICALL Java_mypackage_NativeBuilder_build
(JNIEnv *env, jobject obj, jstring project)

Error calling JNI method

Hello Everyone,
I´m trying to call a method wich is inside a DDL by JNI. This works fine in a Java console application. However, this call doesn´t work when i put this operation in a web apllication and deploy in a weblogic server. I´ve already put the dll path in the PATH variable but it didn´t work. When I debug the application, the DLL can be loaded but i call the native method a error happens and a get the following message:
java.lang.UnsatisfiedLinkError: criptografa
     at com.tim.util.cripto.ACC_Cripto.criptografa(Native Method)
Why does it work when I use a java console application ?
Thanks for help
Rodrigo Lopes

I see yere points but what I see on linux is it makes it to the constructor of the Java object and somewhere afterwards it bails out, the Java app does work alone. It appears to have problems initializing the JFrame, could there be a problem with the Java inheritance when a JVM is invoked throurgh native invocation??
Here's some of the Java stuff
public class Framework extends WindowAdapter {
    public int numWindows = 0;
    private Point lastLocation = null;
    private int maxX = 500;
    private int maxY = 500;
    public Framework() {
        System.out.println("JAVA Framework cnst");//GETTING HERE
        makeNewWindow();
    public void makeNewWindow() {
        System.out.println("JAVA makeWindow"); //GETTING HERE
        JFrame frame = new MyFrame(this); //NOT GETTING HERE!!!!!!!!!
        numWindows++;
        System.out.println("Number of windows: " + numWindows);
        System.out.println("Frame location: " + lastLocation);
        frame.setVisible(true);
        System.out.println("Post Java set frame visible");
    public static void main(String[] args) {
    System.out.println("Main method in Framework");
        Framework framework = new Framework();//GETTING HERE
class MyFrame extends JFrame {
    protected Dimension defaultSize = new Dimension(200, 200);
    protected Framework framework = null;
    public MyFrame(Framework controller) {
        super("New Frame");
        System.out.println("MyFrame cnst ");//NOT GETTING HERE!!!!!!
        framework = controller;
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        addWindowListener(framework);
        JMenu menu = new JMenu("Window");
        menu.setMnemonic(KeyEvent.VK_W);
       setSize(defaultSize);
}

FATAL ERROR in native method: Non-array passed to JNI array operations

After stepping up to JDK 1.4.2 we started getting a hotspot error, I added -Xcheck:jni and it yielded the above error which was not existent in JDK 1.4.1 and for the life of me I cannot find out whats wrong:
Native method dec:
private native byte[] cost(final byte[] byte_array,
final double minCostPerMeter,
final int costFuncSelection,
final double maxCostThreshold);
Method call:
ByteArrayInputStream
inputByteStream = new ByteArrayInputStream(
cost(output_byte_stream.toByteArray(),
minCostPerMeter,
costFunctionSelection.length,
maxCostThreshold));
An array is being passed I have no idea why it is complaing about the method call.
Any help would be appreciated.
-R

What happens if you remove all the code from the JNI method - so it just calls and then returns?
If it still occurs then I would expect that you have a memory problem in a piece of code before this one. Such problems can have no impact when run in one environment but cause failures in another becomes some other legitimate piece of data moved.
If it doesn't then I would expect that the problem is in the method itself and not the call.
It could be some odd VM problem so trying a different version of 1.4.2 might help (but in of itself would not eliminate the possibility that you have a memory problem.)

Call native methods from windows dll

Hello all,
I want to call BlockInput method from User32.dll. My source code looks something like this:
public class User32Dll_1 {
     static {
          try {
               System.loadLibrary("User32");
          catch (Exception ex)
               ex.printStackTrace();
     public static void main(String[] args) throws UnsatisfiedLinkError {
          BlockInput (true);
     /** @param b
     * @dll.import("USER32")*/
     private static native boolean BlockInput(boolean bBOOL);
And the problem is that I get the following exception:
java.lang.UnsatisfiedLinkError: BlockInput
     at User32Dll_1.BlockInput(Native Method)
     at User32Dll_1.main(User32Dll_1.java:27)
Exception in thread "main"
Can someone provide me a solution for this?
Thank you in advance!

can't do
use JACOB
http://danadler.com/jacob/
or
http://www.ezjcom.com/

Calling native method

Guys please help me with following error.
I am running a simple JNI program,after creating and loading the dll i am getting following error.......
Exception in thread "main" java.lang.UnsatisfiedLinkError: print
"print" is the native method in java class Hello.java
Hello.h has method declaration as :
JNIEXPORT void JNICALL Java_Hello_print
(JNIEnv *, jobject);
and C++ file has method defined as :
JNIEXPORT void JNICALL
Java_Hello_print(JNIEnv *env, jobject obj)
printf("Hello World!\n");
return;
please help me out...it has been 3 days banging against JNI ...

Guys please help me with following error.
I am running a simple JNI program,after creating and
loading the dll i am getting following error.......
Exception in thread "main"
java.lang.UnsatisfiedLinkError: print
"print" is the native method in java class
Hello.java
Hello.h has method declaration as :
JNIEXPORT void JNICALL Java_Hello_print
(JNIEnv *, jobject);
and C++ file has method defined as :
JNIEXPORT void JNICALL
Java_Hello_print(JNIEnv *env, jobject obj)
printf("Hello World!\n");
return;
please help me out...it has been 3 days banging
against JNI ...If your Java code is in a package, then your native header file declaration is wrong. The javah tool expects the fully qualified class name. So, if your Hello class is in package com.foo.hello, you should generate the header file like this:
javah com.foo.hello.HelloThen the native header declaration will look like this:
JNIEXPORT void JNICALL Java_com_foo_hello_Hello_print
(JNIEnv *, jobject);

How call native method without code modification

"How to access third party's C API from Java Using JNI without modifying the C code"

Unfortunately, the only way I know of doing this is to use a pass-through DLL that you write. Logically it
looks like this:
Java App (written by you)
|
v
Java native methods (written by you)
|
v
JNI DLL (written by you)
|
v
3rd party DLL
It adds a little bit of overhead, but it's not too big of a deal. Check out the JNI tutorial on how to write this.
Bryan

Error calling native methods

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