Impromptu Query Data Limit??

[USX01]

When adding Query Data Items, Report --> Query then adding calculations to the Query data, there seems to be limit. I can add the data items, however when you try to add them into a definition of a certain query data item (Available Components, the Report Columns folder), it will not be in that folder.

I curious whether or not there is a query data item limit. I know as of now, there is roughly 310 items in the query data and it seems anything after that will not appear in the report folder when using that item in a calculation.

THanks