Strange behaviour with HBR (Planning 931)

Hi All,

We have Business rules which do not take more than a minute to run. This BR works sometimes and sometimes it does not (and both times i'm not doing anything different).
It gives the following error through the web

"An error occurred while running the specified calc script. Check the log for details."

On running Planning in the forground mode i found out that whenever the user is not able to run the BR this error would show up

INFO [ACTIVE] ExecuteThread: '3' for queue: 'weblogic.ke
rnel.Default (self-tuning)' com.hyperion.hbr.plugin.essbase.EssbaseMetadataServe
rElement - Cannot connect to olap service. Cannot connect to Analytic Server. Er
ror:Analytic Server Error(1200332): Error parsing formula for [REGION DEFINITION] (line 0): invalid number format

Application Log:

[Tue Jan 22 09:31:02 2008]Local/Expense/xxx/Error(1200332)
Error parsing formula for [REGION DEFINITION] (line 0): invalid number format
[Tue Jan 22 09:31:02 2008]Local/Expense/xxx/Error(1200332)
Error parsing formula for [] (line 0): invalid number format
[Tue Jan 22 09:31:02 2008]Local/Expense/xxx/Warning(1080014)
Transaction [ 0x10e000b( 0x47962856.0xb30cb ) ] aborted due to status [1200332].

And the next moment the BR would run just fine :)

Any help is apprechiated
thanks