A fatal error message appears when you open a new or existing statement in Intuit Statement Writer (ISW) or QuickBooks Statement Writer (QSW)
Fatal Error: QuickBooks SDK returned an invalid result.
There could be several reasons for this error:
The QuickBooks preferences Use Account Numbers and Show Lowest Subaccount Only are selected.
QBSDK.INI file has Accelerator enabled.
Perform these solutions in order, as the first solution may resolve the error.
Update your program to the latest entitled release.