Dear Mahipal,
Please note that for precalculation to work fine, make sure that Transaction RRMX and refresh for
workbook should be working without any errors on PRECALCULATION SERVER.
As you wrote that RRMX is throwing error so this is the main catch here.
I would suggest you to please go through our below Wiki which will help you to solve your RRMX issue first.,
http://wiki.sdn.sap.com/wiki/display/BI/RRMX
Also refer to below wiki as well,
http://wiki.sdn.sap.com/wiki/display/BI/Checklist+for+Precalculation+Server
Regards,
Arvind