We are seeing those errors after the 11.1.0.7 upgrade. This happens for both custom and standard objects. So we enabled trace for the event 22923 and and one of the things I noticed in the trace apart from the plsql stack which I dont understand is this peshmmps_Open_And_Map_Shm_Object: Object_Name = /PESHM_EXT_388_OF2_DEV_39 Object_Size = 266208 Access_Flags = 2 Creation_Disposition = 0 Creation_Mode = 504 Map_Protection = 7 Shared_Memory_Object = 1 Op Name = shm_open failed Location = peshmops_Ope Error Number = 2 error message:No such file or directory *** 2009-11-19 22:27:12.097 ----- Error Stack Dump ----- ORA-22923: amount of data specified in streaming LOB write is 0 shm_unlink failed with error 2 error message:No such file or directory Is there anyway to find out what file it is trying to read or complain about? Thank you Kumar