Errors in R4 reports

Hi

We have migrated to BO 4.0 from BO 3.0 . During report testing in R4 we have found the following errors:

1. During refreashing the Report:An internal error occured while calling ‘getPromptList’ API. (error: ERR_WIS_30270)

2. During selecting LOVs for Prompt:com.businessobjects.sdk.core.server.CommunicationException$UnexpectedServerException: An internal error occurred while calling 'processDPCommandsEx' API. (Error: ERR_WIS_30270)

3. During Scheduling the report:Database error: ct_connect(): user api layer: internal Client Library error: Read from the server has timed out.. (IES 10901)

Please share your idaes to resolve these errors.

Thanks

Ghanshyam