Quickbooks File Repair — C=315

QuickBooks error C=315 is an "assertion failed" miscellaneous error -- the program reached a place in its own code it didn't expect and wasn't sure how to proceed. Because the code is raised in many different situations, its severity depends entirely on where it appears.

What C=315 means

An assertion failure means QuickBooks hit an internal consistency check that didn't pass. The program halts that operation rather than risk doing the wrong thing. Since C=315 is used across many parts of QuickBooks, the same code can be trivial in one context and a real warning in another. The context in which it appears is the most important clue.

Common causes

• A damaged list -- it commonly shows up during list activities or reports, which points to a list problem.
• Low available memory while QuickBooks is running.
• Conflicts with other programs running at the same time.
• Older versions of QuickBooks and Windows, where the error appears more often.

What you can safely try first

• If it happens inside a list or report, re-sort the affected list -- this often clears a minor list problem.
• Free up memory: close other windows and other running programs, then retry the action.
• Shut down background applications one at a time to see whether a conflict disappears.
• Confirm you're on the latest maintenance release of your QuickBooks version.

When professional recovery is the safer path

If re-sorting and freeing memory don't stop C=315, or it keeps returning when you open specific transactions or reports, the company file likely holds a damaged list or record that needs repair below the surface. Our engineers can open the .QBW file, locate the failing list or transaction, and repair it so QuickBooks stops asserting. The work is performed in-house in North America, and our no-data-no-charge policy means you pay nothing if the data cannot be recovered.

Learn about our QuickBooks data recovery service, or start a recovery and we'll diagnose the file.