NW RFC SDK: RFC_INVALID_PARAMETER from RfcGetFunctionDesc

I'm trying to use function RfcGetFunctionDesc from NW RFC SDK for two custom, RFC-enabled functions in SAP. In one case it works all right. But when I try for the second one I get error 20 (RFC_INVALID_PARAMETER). The only thing I change in code is the function name.
What might be the reason why RfcGetFunctionDesc returns error 20 (RFC_INVALID_PARAMETER)? Are the limitations on types of export/import/table parameters or exceptions of function so that it could be inspected by RfcGetFunctionDesc

Problem solved: some standard table data types appear as not Unicode compatible. They make RfcGetFunctionDesc to raise this error. Solution: use other types or create your own from scratch.

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SAP NW RFC SDK throws RFC_INVALID_PARAMETER when running sample programs?

Hi there,
I have just downloaded the latest version of the SAP NW RFC SDK (NWRFC_7-20004565.SAR) for Linux 64 bit from the Service Marketplace and am trying to run the demo programs.
NOTE: I removed the "sapnwrfc.ini" from the current directory so that it would not be used at all..
Also note that I can use the OLD RFC SDK and connect happily to the same SAP system I am trying to connect to below using the SAP NW RFC SDK....so I definetly have the cirrect settings.....
So I compiled a CLIENT test program like:
gcc -m64 -Wall -g ./sflightClient.c -I/home/lynton/Desktop/nwrfcsdk/include -L/home/lynton/Desktop/nwrfcsdk/lib -lsapnwrfc -lsapucum -o ./sflightClient
And then passed in VALID paramters to an SAP system I have access to and I keep getting RFC_INVALID_PARAMETER even though I have not touched the code below in the sflightClient.c program
     loginParams[0].name = cU("ashost");     loginParams[0].value = argc > 1 ? argv[1] : cU("hostname");
     loginParams[1].name = cU("sysnr");     loginParams[1].value = argc > 2 ? argv[2] : cU("50");
     loginParams[2].name = cU("user");     loginParams[2].value = argc > 3 ? argv[3] : cU("user");
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     loginParams[4].name = cU("client");     loginParams[4].value = argc > 5 ? argv[5] : cU("800");
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serverCon[0].name = cU("PROGRAM_ID");     serverCon[0].value = cU("TEST_SERVER");
        serverCon[1].name = cU("GWHOST");     serverCon[1].value = cU("test.server");
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     repoCon[4].name = cU("ASHOST");     repoCon[4].value = cU("test.server");
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I have the UUIDD daemon running perfectly on my box, but yet I keep getting this RFC_INVALID_PARAMETER regardless if I just test the SERVER REGISTRATION or a simple client connection.
I am connecting to a NON unicode system but that would not make a difference.....
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Thanks
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I have similar problem. My simply program use 7.10_x64_nwrfcsdk for Linux x64 and 7.10_IA32_nwrfcsdk for 32bit Linux. I has been prepared subroutine to convert ASCII to UTF16LE and control 2-byte Unicode length.
Program is working perfectly on x64 environment but didn't work on 32bit. I prepared log for it. In log converted to UTF16LE data are present as hex
x64
=================================================
Open library libsapnwrfc.so done, handle 0x1ccac00
ahost=10.146.0.53
61 0 73 0 68 0 6F 0 73 0 74 0
31 0 30 0 2E 0 31 0 34 0 36 0 2E 0 30 0 2E 0 35 0 33 0
sysnr=01
73 0 79 0 73 0 6E 0 72 0
30 0 31 0
client=500
63 0 6C 0 69 0 65 0 6E 0 74 0
35 0 30 0 30 0
user=dybikowskiz
75 0 73 0 65 0 72 0
64 0 79 0 62 0 69 0 6B 0 6F 0 77 0 73 0 6B 0 69 0 7A 0
lang=EN
6C 0 61 0 6E 0 67 0
45 0 4E 0
Start login to SAP
Login to SAP done, handle 0x1d863b0
================================================
x32
================================================
Open library libsapnwrfc.so done, handle 0x900fb78
ahost=10.146.0.53
61 0 73 0 68 0 6F 0 73 0 74 0
31 0 30 0 2E 0 31 0 34 0 36 0 2E 0 30 0 2E 0 35 0 33 0
sysnr=01
73 0 79 0 73 0 6E 0 72 0
30 0 31 0
client=500
63 0 6C 0 69 0 65 0 6E 0 74 0
35 0 30 0 30 0
user=dybikowskiz
75 0 73 0 65 0 72 0
64 0 79 0 62 0 69 0 6B 0 6F 0 77 0 73 0 6B 0 69 0 7A 0
lang=EN
6C 0 61 0 6E 0 67 0
45 0 4E 0
Start login to SAP
----Error handling begin-----
errorInfo.code: 20
RFC_INVALID_PARAMETER
errorInfo.group: 5
EXTERNAL_RUNTIME_FAILURE
errorInfo.key: R
errorInfo.message:
-----Error handling end -----
No connect to SAP
Because ASCII conversion to UTF16LE (http://en.wikipedia.org/wiki/UTF-16) is very simple, I prepared function
char* ascii2utf16le( char *text_ascii)
    int rec=-1;
    int i=0;
    int j=0;
    int n=0;
size_t inbufsize = strlen(text_ascii);
size_t outbufsize=(2*inbufsize);
   i=2*inbufsize;
char *converted = calloc(outbufsize, sizeof(char));
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        if(0==(j%2))
            converted[j]=text_ascii[n];
            n++;
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          converted[j]=0;
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printf("\n");
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    return converted_str;
and next I use it to loginParams[0].name = ascii2utf16le("ashost"), etc.
Fixed-length Unicode representation expected by SAP R/3 is under control, but on Linux 32bit not work.
I haven't where is possible problem?

Where can I download NW RFC SDK from?

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Thanks Pinkle.
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Hi!
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Hi,
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some of the things not covered in this are
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REPORT ZTEST_GET_SREUCTURE.
DATA : PARAMS     type table of     RFC_FUNINT,
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data: NAMETAB     type table of     X031L,
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data: FIELDS type table of RFC_FIELDS,
      ls_fields like line of fields.
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Hello,
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Thank you very much in advance and best regards,
Thorsten

Hello,
Thanks a lot for your extremely high-quality replies. Iu2019ve been trying to work with them.
Frankly, just when (after Gregoru2019s and Timu2019s posts) I was hoping that working my way deeply enough into SNC, I would be able to solve my problem, Wolfgang comes along and tells me what Iu2019m aiming at wonu2019t work. Now Iu2019m confused.
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When a user logs on to the PL/SQL application, the username and password are sent for validation to an ABAP BAPI.
If authentication is successful, the AS ABAP returns a SAPLogon ticket which can be stored in the session context of the PL/SQL application and used in subsequent RFC calls. The password (a hash?) would only be transferred once during logon.
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for solution 1 the administrative overhead for synchronization
for solution 2 the run-time dependency Oracle-ABAP and the change impact on the Oracle applicationu2019s user management concept?
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Thorsten

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/people/ulrich.schmidt/blog/2007/05/10/sap-netweaver-rfc-sdk
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aCC -DSAPonUNIX -DSAPonHPPA -DSAPwithUNICODE +DD64 -Aa +W392,829,818,887 -DSAPwithTHREADS -mt -w +O2 -DNDEBUG +inst_compiletime -c <program>.cpp
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Crash in SAP NetWeaver RFC SDK DLL

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Thanks Mike,
For example we want to executie Function Module and need to prepare/allocate TABLE parameter.
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Hello,
As part of the effort to install BO integration for SAP, i have come across installation of RFC SDK as a prerequisite. I have downloaded the RFC SDK from the market palce (7.00 unicode for Windows 64 bit). But i have been reading up on the internet that RFC SDK can be installed as an add on component while installing SAP GUI. I tried doing this using both, SAP GUI 7.10 (compilation 2) and SAP GUI 7.20 but can't find this component for selection. Am i missing something?
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Edited by: Prashant Pasala on Jul 5, 2011 5:30 PM

Hello Ingo,
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Hello,
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Hi Aleksandra,
if still open, this blog might help Setup data encryption between RFC Client and Web AS ABAP with SNC
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hello Gurus,
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BR
Honey

HI,
please have a look at the link below..
this may help u !!!
[Re: how can i debug a rfc being called from .net connector (NCO) v2.0?;
Best of Luck !!1
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We don't certify Solaris on NT.
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SAP RFC SDK 7.10 Compilation Issues

Hello ,
We have a Pro*C program that is using the RFC SDK 7.10
When we are compiling our program with Pro*C Compiler in HP UX 11iv2 os we are getting the following errors:
SAP_U16_PROTOTYPE_STDC(mkstemp)..1 PCC-S-02201, Encountered the symbol "mkstemp" when expecting one of the following: Error at line 1895, column 1 in file /home/psoni/rfcsdk-710/orgseclib/sapuc.h SAP_U16_PROTOTYPE_UO(dirname) 1
PCC-S-02201, Encountered the symbol "SAP_U16_PROTOTYPE_UO_HLP" when expecting on
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Syntax error at line 1901, column 1, file /home/psoni/rfcsdk-710/orgseclib/sapuc.h:
Error at line 1901, column 1 in file /home/psoni/rfcsdk-710/orgseclib/sapuc.h
SAP_U16_PROTOTYPE(ecvt) 1
PCC-S-02201, Encountered the symbol "extern" when expecting one of the following
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I had checked the files sapuc.h and sapucx.h are correctly included in my program.
Also I checked for the errors : that the reference of some constants like
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Please can anyone guide me - or give any hints as to how this compilation issues can be resolved.
On sap rfc sdk version 6.20 with HPUnix 11iV1 we did not face such problems. Post that release we have tried all libraries including 6.40 and all of them are giving the above errors.
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Regards,
Shivani

This compiler error looks really strange.
Without your sources (of the affected file) and the full command line it's impossible to suggest something.
Markus

NW RFC SDK: RFC_INVALID_PARAMETER from RfcGetFunctionDesc

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