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About roytsganda

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  1. roytsganda

    Runtime error #9(trap) in Jet

    Thanks for the info. I am indeed using JNI with my own DLLs, so I'll try your suggestion and see what that brings to light. One problem is that this error #9 is exceedingly rare (but still has users complaining), so it's not just a case of producing a small piece of code to demo it. Is there any source for explanations of Jet errors? Even if there could be many explanations for one error, this would give your customers something to go on. I could not find any explanation of the #9 error anywhere on the web. Regards, Roy
  2. roytsganda

    Runtime error #9(trap) in Jet

    Correction, I'm using Jet 4.0 with MP3 (not MP1). Roy
  3. roytsganda

    Runtime error #9(trap) in Jet

    I have "Runtime error #9(trap) in Jet" This occasionally happens when dragging and dropping things into my app - things including files, icons and favicons, all of which work normally most of the time, but occasionally fail with the "not permitted" icon (circle with diagonal line) and occasionally fails with the above Jet message as well. The "not permitted" icon never appears when running the app in Java (1.4.2) I'm using Jet 4.0 with MP1. Any ideas, please? Roy
  4. roytsganda

    Compatibility with JDK 1.6

    My products will not be compatible with Vista until I have 1.6 compatability in Jet and I have requests for a Vista version now. The idea of waiting perhaps another six months is a serious worry. 1. As far as I can discover, on Windows Vista, the timezone is returned correctly only by jre1.6.0 (1.6.0-b105). It returns GMT+8, Asia/Shanghai for us - we are in Hong Kong, but the timezone is the same. All of these: jre1.5.0-b64, jre1.4.2_11-b06 and jre1.4.2_13-b06 on Vista show the timezone as GMT+0. My software, compiled with Jet and run on Windows XP returns the correct timezone (whether is us the VM for 1.4.2 or 1.5) 2. On Windows Vista, using a version of my software compiled to the 1.5 JVM with Jet, Swing buttons are grayed out in some cases. The same happens in Java 1.5 itself. It is OK with Java 1.6 and it is OK with Jet on Windows XP. You asked Xray: > May I ask why it's important for you? > I mean what's appeared in Java 6 that you could not find in Java 5. Well for me, it's not what I can find in 1.6 that isn't in 1.5, but what works under Vista in 1.6 and not in 1.5.
  5. roytsganda

    Windows Vista

    As Vista is now available to the public and PCs are being sold with it on, those of us with products in the market need to be able to deliver Vista-compatible products. Can we ask for the latest status on Vista-compatible versions of Jet, please? We have actions in our software that work in the Java version on Vista and work when compiled with Jet and run on WinXP. However, the Jet-compiled versions do not work properly when run under Vista (Business). Differences observed so far are invisible checkboxes and drag and drop favicon to our product's window.
  6. roytsganda

    Jet-compiled exe gives NullPointerException in W98

    Excelsior sent me a Hotfix for Jet pro edition 3.6. (A fix for 3.7 is available too). With the test program in my original post, this now works without NPEs. We have now recompiled our product (see www.topicscape.com) with it and so far have not experienced any NullPointerExceptions under the normal operating conditions that produced them before with the JET version of our software. We have also conducted some stress tests and these too seem to be operating normally. Our thanks to Excelsior for their help in overcoming this problem. It took a while, but they (and we) kept at it until it was solved.
  7. roytsganda

    Jet-compiled exe gives NullPointerException in W98

    Here's the source code for test prog mentioned in the original post --------------------------------------------------------------------- import org.apache.log4j.Logger; import java.io.BufferedReader; import java.io.File; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.Iterator; public class JetTest01 { static final Logger log = Logger.getLogger(JetTest01.class); static int fileCount = 0; static int deepestLevel = 0; private static final int ONE_MEGA_BYTE = 1048576; static { File b = new File("b"); File absoluteFile = b.getAbsoluteFile(); System.out.println("absoluteFile = " + absoluteFile); } public static void main(String[] args) { try { log.info("JetTest01"); for (int i = 0; i < args.length; i++) { String arg = args; log.debug("arg[" + i + "]\t" + arg); } if (args.length == 2) { String directory = args[0]; log.info("directory\t" + directory); // Get Heap Size float heap = (float) Runtime.getRuntime().maxMemory() / ONE_MEGA_BYTE; log.info("Maximum Heap Size (MB)\t" + heap); // Get Number of objects created at start int objectCount = 20000; try { objectCount = Integer.parseInt(args[1]); } catch (NumberFormatException e) { log.info(e.getMessage()); } log.info(objectCount + "\tobjects"); byte[] array = new byte[objectCount]; for (int i = 0; i < objectCount; i++) { array = 0; } log.info("Scanning"); JetTest01 tc = new JetTest01(); tc.ShowFileInfo(directory); log.info("Completed"); log.info("f/d recursed\t" + fileCount); log.info("Deepest Level\t" + deepestLevel); //throwExp(); } else { BufferedReader console = new BufferedReader(new InputStreamReader(System.in)); try { log.info("You must input the directory that you want to test. Press enter to quit."); console.readLine(); } catch (Exception e) { log.error("Error details\t", e); } } } catch (Throwable e) { log.error("FAILED"); log.error("Error details\t", e); /* log.error("Manually extracting nested causes and traces...."); Throwable current = e; do { log.error(current); StackTraceElement[] stackTrace = current.getStackTrace(); for (int i = 0; i < stackTrace.length; i++) { StackTraceElement stackTraceElement = stackTrace; log.error(stackTraceElement); } log.error(""); current = current.getCause(); } while (current != null); */ } finally { log.info("done"); } } private static void throwExp() { RuntimeException a = new RuntimeException("a"); RuntimeException b = new RuntimeException("b", a); RuntimeException c = new RuntimeException("c", ; RuntimeException d = new RuntimeException("d", c); RuntimeException e = new RuntimeException("e", d); RuntimeException f = new RuntimeException("f", e); RuntimeException g = new RuntimeException("g", f); throw g; } public void ShowFileInfo(String pathname) { if (!new File(pathname).exists()) { throw new IllegalArgumentException(pathname + " cannot be found."); } ArrayList fileInfo = new ArrayList(); GetFileInfo(fileInfo, pathname, 1); for (Iterator it = fileInfo.iterator(); it.hasNext() { it.next(); fileCount++; } } private void GetFileInfo(ArrayList fileInfo, String filePath, int level) { if (level > deepestLevel) deepestLevel = level; File file = new File(filePath); String preSpace = new String(); for (int i = 1; i < level; i++) preSpace = preSpace.concat(" "); if (file.isDirectory()) fileInfo.add(preSpace + "+" + file.getAbsolutePath() + "\\" + file.getName()); else fileInfo.add(preSpace + "-" + file.getAbsolutePath() + "\\" + file.getName()); if (file.isDirectory()) { String[] fileList = file.list(); for (int i = 0; i < fileList.length; i++) { GetFileInfo(fileInfo, file.getAbsolutePath() + "\\" + fileList, level + 1); } } } }
  8. Problem: We have a large Java program that for some functions gives Null Pointer Exceptions (NPEs) when run on Windows 98 in its Jet-compiled form but gives no exceptions when run in Java with identical data. We are using Jet 3.6, but we have tried this same program with a trial version of Jet 3.7 and that's the same. Investigation: We wrote a much smaller Java program that simulates one of the troublesome functions in the large program. The program traverses a given directory and counts the number of files and directories that have been visited. We compiled the program using Jet 3.6 MP3 Pro. We JetPack the program and ran it on a Windows 98 installation. The same problems do not happen in Windows XP. We tested the program with a directory containing a hierarchy of 1,700 directories to a depth of eight levels and with a total of 90,000 files. This test program never fails when run in Java directly. We tried Jet Heap sizes of 64MB, 96MB, 128MB, 256MB and 512MB. In combination with these Heap sizes, we made compilations with Stack sizes of 400K, 878K, 1M and 2M. We tested all combinations with the same test data (the 1,700 directories mentioned above) to give a 5 x 4 matrix (Heap size x stack size) of results - attached as Jet tests.jpg. For each heap size at least one stack size would result in NPEs, and sometimes two stack sizes resulted in NPEs. The tests run directly in Java used a Heap Size of 128MB. Results: The test program gives the exceptions numbered [1] to [6] below. For [1], we are sure that it is not our programmatical error because we never have the error when running the Java version. For [2], again, it is not something that we did wrong with the code. getAbsolutePath() should never give a NullPointerException , even if the file object does not exist in the filesystem. For [3], the index is not in our control, we were just calling File.getName(). For [4], [5] and [6], we are sure that the elements we are looking for exist in those Arraylist and AbstractList and we did not encounter these exceptions in the Java version. Our conclusion: The large Java program that 1st brought this problem, to our notice does similar file operations to the test program and not only it will give NullPointerExceptions, it will also give NoSuchElementExceptions and ClassCastException when we use Java Collections. Clearly this Sun Java library should never give exceptions! We suspect that the runtime environment of Jet is somehow corrupting the data structures in memory and giving us these strange kinds of exception. I will post Java code as a reply to this. Can anyone help, please? Thanks [1] java.lang.NullPointerException at java.util.ArrayList.add(Unknown Source) at JetTest01.GetFileInfo(JetTest01.java:132) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.ShowFileInfo(JetTest01.java:110) at JetTest01.main(JetTest01.java:54) [2] java.lang.NullPointerException at java.io.Win32FileSystem.resolve(Unknown Source) at java.io.File.getAbsolutePath(File.class:0) at JetTest01.GetFileInfo(JetTest01.java:132) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.GetFileInfo(JetTest01.java:137) at JetTest01.ShowFileInfo(JetTest01.java:110) at JetTest01.main(JetTest01.java:54) [3] java.lang.StringIndexOutOfBoundsException: String index out of range: -143231424 at java.lang.String.substring(Unknown Source) at java.lang.String.<unknown>(Unknown Source) at java.io.File.getName(Unknown Source) [4] java.lang.NullPointerException at java.util.ArrayList.get(ArrayList.java:322) [5] java.util.NoSuchElementException at java.util.AbstractList$Itr.next(Unknown Source) [6] java.lang.NullPointerException at java.util.ArrayList.get(Unknown Source) at java.util.AbstractList$Itr.next(Unknown Source)