SAP Adapter - Problem with SAP Monitor (systat01)

Hi.

I use an old product verison 4.8 (called sap bc).
If start the IS i see errors in “Logs>Error” and “SAP>Monitoring>SAP Log” over the sap adapter.

Error message:
java.io.IOException: File 0A01A9231ED639478DF3090B corrupt
at pub.sap.monitor.systat01.report(systat01.java:123)

How can I delete the (old file) entries?

Thanks for ideas,
Timo.