Bex Query: Too many table names in the query The maximum allowable is 256

Hi Experts,

I need your help, Im working on a Query using a multiprovider of 2 datastores, I need to work with cells to assign specific acconts values to specific rows and columns, so I was creating a Structure with elements from a Hierarchy, but I get this error when I'm half way of the structure:

"Too many table names in the query. The maximum allowable is 256.Incorrect syntax near ')'.Incorrect syntax near 'O1'."

Any idea what is happening? is ti possible to fix it? do I need to ask for a modification of my Infoproviders? Some one told me is possible to combine 2 querys, is it true?

Thanks a lot for your time and pacience.