Not printing the output of this request because post-processing failed.

While seeing the request log got the following information

Post-processing of request 50834534 failed at 17-JUL-2012 16:43:23 with the error message:
The concurrent manager has timed out waiting for the Output Post-processor to finish this request.

Check that there are enough Output Post-processor service processes running.
More information may be found in the service process logfile.
+--------------------------------------+

+------------- 2) PRINT   -------------+
Not printing the output of this request because post-processing failed.
+--------------------------------------+

Solution:-
Increase the profile option “Concurrent:OPP Process Timeout”..

 Check User level profile setting if its blank the paricular user will use site level profile setting

OR

while checking the OPP manager log 
i picked the following  error 

Caused by: oracle.xdo.parser.v2.XPathException: Cannot convert 417,8955 to number

i think this is data issue....

Probably a data conversion error

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