EDI - Unable to allocate a new thread in the time specified

Our organisation uses wM 6.0 for EDI. In recent days we see the below error message & as a result we are unable to create the flat file for the EDI files. Sometimes 0KB flat file is created which is causing the legay applciation to abend when they try to pick up the file. Can you let me know how to fix this issue?

Error processing Cleanup service: [9119] Unable to allocate a new thread in the time specified

Error processing service: [FPL.0002.0004] Server Error: Too many open files

Take some time and look in the Advantage.webmethods.com/Empower and use keyword search,there are various suggestions given to resolve this kind of issue.

HTH,
RMg