Hi Violeta, Thanks for the response. I have tried what you've suggested but that did not resolve the problem. I think the issue is related to the size of the CLOB. One of the CLOBs that fails is 33,872 bytes. -- Bill

Any ideas?

When removing the CLOB from the report, the XLSX works as expected.

Here's a way to exclude the params from the report: Under the data model, there's a Properties link. Within Properties, there's a "Include Parameter Tags" option under XML Output Options. Deselecting this will remove the params from the report. -- Bill