FDPSTP failed due to ORA-20100: File o0254607.tmp creation for FND_FILE failed error

hi

custom concurrent program giving below error after refresh 

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procedure

exec FND_FILE.PUT_LINE(FND_FILE.LOG, 'THIS IS A TEST');

also giving the below error

ORA-06512: at "APPS.FND_FILE", line 378
ORA-06512: at "APPS.FND_FILE", line 473
ORA-06512: at "APPS.AP_TRIAL_BALANCE_PKG", line 192


we fallowed 
Concurrent Processing - Troubleshooting Concurrent Request ORA-20100 errors in the request logs [ID 261693.1]


but no use 



please suggest some solution or idea to fix this