Analysis Office workbook scheduling error

Hi Experts,

Need your help.

We tried to schedule a Analysis workbook created on BEx query and got below errors.

1. "An error occurred: could not precalculate instance {0}"

2. "unexpected exception caught. Reason: [Java.lang.IndexOutOfBoundsExceptionIndex:0,Size:0]

We are on

SAP BI 4.1

Analysis Office 1.4

Please help me on this.

Thanks,

Rajendra