PBCS Data Management integration to Fusion Financials

Summary:

Loading Data via integration from PBCS to Fusion Financials Essbase Cube for reporting budgets in Fusion, unhelpful error message

Content (required):

I am trying to load budget data from PBCS to Fusion Financials for reporting (i.e. NOT budget control) purposes and I have followed and completed the prerequired steps for Financials set up, I have also manually checked the equivalent manually exported data with Fusions non-parent flex fields and created mappings where necessary.

The steps complete successfully up to the export stage, which errors, but the error is not helpful to me, can anyone provide any guidance on what the below is telling me / where to find more detail / what the fix is likely to be?