Pb with Log Analyser and showlog with WAS 3.5.3/Linux

[Denis]

When I try to run Log Analyser for WAS 3.5.3/Linux with the activity.log
file as input, I receive the following message:

"IVB10001E: Cannot load log file /opt/IBMWebAS/logs/activity.log.
java.io.IOException: IVB11002E: The file is not a valid log file."

I 've seen posts in this newsgroup describing the same pb on Solaris but
there is no answers to those posts.

Also, when I run the showlog script, (./showlog ../logs/activity.log), it
starts formating the logs but after 50 output lines, it fails with the
follwing exception:
FormatWarning:
Exception in thread "main" java.lang.IllegalArgumentException: Cannot format
given Object as a Date
at java.lang.Throwable.<init>(Throwable.java:96)
at java.lang.Exception.<init>(Exception.java:44)
at java.lang.RuntimeException.<init>(RuntimeException.java:49)
at
java.lang.IllegalArgumentException.<init>(IllegalArgumentException.java:45)
at java.text.DateFormat.format(DateFormat.java:287)
at java.text.Format.format(Format.java:139)
at java.text.MessageFormat.format(MessageFormat.java:749)
at java.text.MessageFormat.format(MessageFormat.java:501)
at java.text.Format.format(Format.java:139)
at java.text.MessageFormat.format(MessageFormat.java:494)
at com.ibm.ejs.ras.TraceNLS.getFormattedMessage(TraceNLS.java:200)
at
com.ibm.ejs.ras.ExtendedTraceLogger.translateMessage(ExtendedTraceLogger.jav
a:263)
at
com.ibm.ejs.ras.ExtendedTraceLogger.log(ExtendedTraceLogger.java:143)
at com.ibm.ejs.ras.ShowLog.main(ShowLog.java:91)

Any Clue? (The same occurs if I transfer in binary the activity.log file on
W2K and try to read it with the NT version of the LogAnalyser)