Error message with NSD

Hello,

We have just installed the first 6.5.1 server in our domain. And whe have experienced an HTTP hang (not a crash) and we wanted to run NSD to get some additional information. But when i run the NSD tool i got a error message like “FATAL(1): can’t open INFO (0): Starting Debugger” and after this nothing is happening anymore eve the debugger doesn’t start.

I am running the NSD tool from the data directory as it should be so thats not the problem . Anyone else have any clue how to solve this ? I couldn’t find any info in the knowledge base as well about this issue.

Thanks in advance