While loop does not execute
I wish to write a text file that is tab separated for viewing in UNIX, however the tab character provided in Labview is read as a ^M in the UNIX file and in notepad. If you have any suggestions, they would be appreciate
In article <506500000008000000206F0000-1042324653000@exchange.ni.com>,
"smd169" wrote:
> I wish to write a text file that is tab separated for viewing in UNIX,
> however the tab character provided in Labview is read as a ^M in the
> UNIX file and in notepad. If you have any suggestions, they would be
> appreciate
When I write a tab delimited file on my Linux box I just get tabs. The
only time I see the ^M is when I use a carriage return instead of a tab.
To suppress the ^M in Linux I've been told to use line feeds or the combo,
carriage return/line feed. I tried it and it works. Sorry if this
doesn't answer your question. Perhaps results are different on a pure
Unix system? Maybe it's the text viewer... I used less and joe to verify
my results
-Kevin
Similar Messages
-
I have been a software engineer for a number of years now, and thus far I have never come across any coding issues that truly merit a post such as this. Someone has almost always run across the issue before, so there is no need to reinvent the wheel, or solution as it were.
However, a number of times I have run across instances where the JRE simply... does not execute parts of my code, and throws no exceptions.
The sample code is a simple logging application, watered down to the bare minimum for the purposes of this forum:
public class Log {
public static void main(String[] args) {Log log = new Log();}
public Log() {Logger.log("Hello World");}
import java.util.*;*
import java.io.*;
import java.text.SimpleDateFormat;
public abstract class Logger {
private static final int SIZE = 2;
private static final SimpleDateFormat DAY = new SimpleDateFormat("EEEE");
private static final String
DIR = "logs/",
EXT = ".log",
FILTER = ".*log\\z",
DNE = "DNE";
private static int i,oldest;
private static long previous = 0;
private static FileFilter filter = new LogFilter();
private static FileWriter out;
private static File file,directory;
private static File[] list;
public synchronized static void log(String param) {
try {
directory = new File(DIR);
file = new File(DIR + getDay() + EXT);
list = directory.listFiles(filter);
if (file.createNewFile()) {
readOnly();
reconcile();
write(param);
catch (Exception exception) {}
private static void write(String param) throws Exception {
out = new FileWriter(file, true);
out.write(param);
out.close();
private static void readOnly() throws Exception {
for (i=0;i<list.length;i++) {list.setReadOnly();}
private static void reconcile() {
try {
previous = list[SIZE].lastModified();
oldest = SIZE;
for (i=SIZE;i<=0;i--) {
if (list[i].lastModified() <= previous) {
previous = list[i].lastModified();
oldest = i;
list[oldest].delete();
catch (Exception exception) {System.out.println("Skipping reconciliation...");}
private static String getDay() throws Exception {
return DAY.format(Calendar.getInstance().getTime());
private static class LogFilter implements FileFilter {
public LogFilter() {}
public boolean accept(File param) {
try {
if ((param.getName()).matches(FILTER)) {return true;}
else {return false;}
catch (Exception exception) {return false;}
*The problem*:
Ok, easy visual, this is the "log/" directory as I run the Log.java application repeatedly and iterate the date on my computer as I do so.
Thursday
*log/*
+Thursday.log+
Friday
*log/*
+Thursday.log+
+Friday.log+
Saturday
*log/*
+Thursday.log+
+Friday.log+
+Saturday.log+
Sunday
*log/*
+Friday.log+
+Saturday.log+
+Sunday.log+
Monday
*log/*
+Friday.log+
+Saturday.log+
+Monday.log+
This is the point at which I go ???
Turns out, the JRE skips the execution of my for loop in the *reconcile()* method when the date rolls over to Monday, and from then on it simply deletes the previous day's log instead of the oldest log.
Why? Who knows.
Things I have tried:
- Using another variable integer for the *readOnly()* method
- Removing the synchronized keyword from the *log(String param)* method
- Second call to *directory.listFiles(filter)* and setting *SIZE* to *3* after the old files have been set to read-only
- Removing the call to *readOnly()*
- Verified that the call to *readOnly()* does not alter the +modified+ date on the log files
- Changed Logger.java from a +static+ class to a +local+ class
Things I cannot do:
This log application stores privy information about end-users at locations across the country in the event that there are support issues that need to be resolved, and the agreement is that we store this information no more than three days. Just wanted to make sure, that the hopefully informed respondants to this issue, know that the obvious solution (storing seven day records), is unfortunately not available to me.
Edited by: Threadstorm on Jan 8, 2009 8:24 AMHA! Most excellent. The last place I would ever look.
Yes, seems like Java sorts the files in such a way that everything works fine without the loop until Monday rolls over.
Now I can have a better appreciation for that second set of eyes.
I use for loops so frequently that I never look at them (though I did stare at this one myself prior to this post, much to my chagrin now) but the subtracting iteration (which I use once in a blue moon) was necessary for the nature of the code.
But ok, up and running! (whew) was going to be a long day until now.
To answer your question though, the Logger is static so I don't have to pass it around to dozens and dozens of other modules but rather just include the package on the fly as I develop new modules that need to log information, and I like to write most mundane things myself if I can, that way I have the freedom to modify them at will.
Thanks again! I'm now a happy camper once more.
I'm also thankful that I don't have to chalk up another notch on the wall of cases where the JRE behaves magically and truly ignores code which I have definitely run into before. Something about listCellRenderers and the order of calls made to them, or some such and JRE doesn't read one of the lines. It's been a year or two.
Edited by: Threadstorm on Jan 8, 2009 8:47 AM -
sir i have given lot of effort but i am not able to solve my problem either with notifiers or with occurence fn,probably i do not know how to use these synchronisation tools.
sir i am using datasocket read ,i am communicating with java but my problem is that bcz im using while loop to see if value has changed my labview consumes all the processors time ,sir i want a event like thing so that while loop is not in continuous loopHi Sam,
I want to pass along a couple of tips that will get you more and better response on this list.
1) There is an un-written rule that says more "stars" is better than just one star. Giving a one star rating will probably eliminate that responder from individuals that are willing to anser your question.
2) If someone gives you an answer that meets your needs, reply to that answer and say that it worked.
3) If someone suggests that you look at an example, DO IT! LV comes with a wonderful set of examples that demonstate almost all of the core functionality of LV. Familiarity with all of the LV examples will get you through about 80% of the Certified LabVIEW Developer exam.
4) If you have a question first search the examples for something tha
t may help you. If you can not find an example that is exactly what you want, find one that is close and post a question along the lines of "I want to do something similar to example X, how can I modify it to do Y".
5) Some of the greatest LabVIEW minds offer there services and advice for free on this exchange. If you treat them good, they can get you through almost every challenge that can be encountered in LV.
6) If English is not your native language, post your question in the language you favor. There is probably someone around that can help. "We're big, we're bad, we're international!"
Trying to help,
Welcome to the forum!
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
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When I touch my iPad screen to execute an app, then the screen goes dark then the app icon reappears. The app does not execute. Any thoughts?
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User exit code does not execute
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I've tried everything I know of with the CMOD and SMOD transactions, and I suspect some sort of transport error.
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"The namespace of program SAPLXQSM has the setting "C" and cannot be tested."
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R3TR CMOD <your project name>
R3TR PROG ZXQSMU01
See if you created any of the objects as local objects.
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Actions does not executed on quotation saved.
Hi,
Actions does not executed on quotation save.
Action profiles has been created as per my production system.
In production system it is executing properly. but in development system it does not get triggered.
Pls suggest.
Points will be rewarded.
ThanksHi Vinayak
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Plz reward points if it helps.
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Tcode opens selection screen, but does not executes the program
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MindaugasAre you using this???
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http://support.apple.com/kb/TS3281
Apple does not respond here this is a user to user forum There are no Apple staff here
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Waiting for approval item does not execute attached procedure !
Hi.
Using 3.0.8 on Solaris.
Create one custom item type and associate one on plsql procedure to be run in place when item is listed within its folder.
Go to folder, add item, look for the plsql result : Good it's working !
After that create an item as a create with approval ACL and come back as folder owner, look at the plsql result : NOTHING !!!
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Any suggestions ?Hi all,
Thanks very much for your feedback.
In reply to Brian's suggestions
1. I checked to see if WS14500013 was defined as general task; it was not and this has has now been rectified. Went through the other workflows also.
Double checked the contents of the tables:
APPROVAL_TABLE, ITEM_APPROVAL_TABLE, ITEM_APPROVAL_OBJECT.
All appeared OK.
Created a simple one line SC. Invoked approval preview and the message: 'Approval step without ad-hoc capability. No preview possible' was displayed. This is odd since WS14500015 and sub-workflows do not use AD-HOC approval. Or am I not understanding this correctly.
Followed Smitas suggestions but to no effect.
Here are the contents of the said tables which I lifted from the workflow tables:
Again, many thanks for your responses...
**APPROVAL_TABLE****
NAME="APPROVERLIST:ApproverList:" <APPROVAL_INDEX>0000000001</APPROVAL_INDEX>
<APPROVAL_BRANCH>0000000001
<APPROVAL_AGENT>USMGRR11000
<APPROVAL_STATE>0000000002
<INITIAL_AGENT>USMGRR11000
<INITIAL_INDEX>0000000002
**ITEM_APPROVAL_OBJECT***.
NAME="ITEMAPPOBJTABLE:ItemAppObjTable:" - <item>
<SC_GUID>957117374BC6434882B0BFD5462A2724</SC_GUID>
<APP_CRIT_NAME1>COST_CTR</APP_CRIT_NAME1>
<APP_CRIT_NAME2>ORDER_NO</APP_CRIT_NAME2>
<APP_CRIT_NAME3 />
<APP_CRIT_VALUE1>R11000</APP_CRIT_VALUE1>
<APP_CRIT_VALUE2 />
<APP_CRIT_VALUE3 />
<APPROVAL_OBJECT_GUID>9E6EFAC500B681458284BBB60BF99C8A
*****ITEM_APPROVAL_TABLE***,
NAME="APPROVALITEMLIST:ApprovalItemList:"
<item>
<APPROVAL_OBJECT_GUID>9E6EFAC500B681458284BBB60BF99C8A <APPROVAL_ITEM_GUID>1137519335F51C4DB3D2844A8AD484C0 -
System - services - reporting does not execute ABAP Reporting
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system -> services -> reporting does not execute ABAP Reporting.
we are able to execute sa38 by running t-code.
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Thanks
HarshitCheck authorizations (SU53).
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