Getting error in SM58 SAP R/3

Hi All,

I am getting temporary error in SM58 of SAP R/3 system Web AS(6.20) connected to SAP PI 7.31 SP04.This error is intermittent and get resolved automatically sometimes in 2 mins..sometimes take more than that.Error is :

/CPIC-CALL: ThSAPECMINIT' : cmRc = 26 thRc= 665#Unknown.

Please let me know the missing config. SM59 RFC destination,port everything is fine and succesfully connected.

It is connected to java port of SAP PI via idoc_aae.

Thanks,

Rohit