CRM Run time error while configuring the product in Opportunity

Hi,

Our system is installed on HP-Unix and db2 as database. CRM version 7.02

While trying to configure product in Opportunity in CRM UI, we are

getting error as "Runtime Error,Contact system administrator'.

We tried to change the parameters for VMC.vmcj/option/ps =

540M;vmcj/max_vm_heap_MB=128. But after setting up these parameters we

were not able to clear the cache. It was prompting us with an error, so

we reverted back the parameters and the runtime error stays.

Kindly suggest.