SQLPLUS exits unusually on Windows WebLogic host

There is an ongoing problem with Forms Compiler/Builder erroring out with a message "<APPLICATION> has stopped working" at the operating system level. This may be related to the actual issue of concern, but it's not certain. On the Windows system mentioned above, when running SQLPLUS from the command prompt - just the keyword will do it, even without parameters - the host will often (but not always) respond with an error saying that SQLPLUS has stopped working within a few seconds, before any other visible changes or processes occur at the command prompt.

The erratic nature of the behavior means it's difficult to diagnose but a few additional things should be noted: the problem stems from the fact "An unhandled win32 exception occurred in sqlplus.exe [9864]" according to the debug readout after it stops working. Additionally, tracing says it more specifically comes from oraociei12.dll faulting in sqlplus.exe, after an access violation when reading location 0x0000000000000000.