Summary

This article will help to explain the reason for the out of memory error seen when attempting to start FlexNet Operations (FNO).

Symptoms

Whilst starting FlexNet operations from a command prompt the following errors have been observed:

Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

Cause

This error occurs when contiguous memory(A large chunk) cannot be assigned to a particular Java process, in this case FNO. For example a machine may have 8GB of memory but if the system cannot assign 2GB as one large chunk then the errors may be observed.

Resolution

Ensure that memory intensive applications are shutdown before attempting to start the Java process(FNO) again. This should help to ensure that there is a contiguous chunk of memory available for FNO to start.