Quickbooks File Repair — "Quickbooks Error C=315 (error reading transaction)"

QuickBooks error C=315 means the program could not read a transaction when it tried to open the company file. The original diagnosis is direct: this error occurs when trying to open the file, which is why it tends to block access to the whole file rather than just one screen.

What the C=315 error means

Opening a company file requires QuickBooks to read the transaction records in sequence. C=315 is raised when one of those reads fails — the program reaches a transaction it cannot parse because the record, or the index pointing to it, is damaged. The surrounding data is usually still on disk, so the issue is reaching past the broken transaction, which is what makes most C=315 files recoverable.

Symptoms you'll typically see

• QuickBooks throws C=315 as the file opens, or partway through loading it.
• The file may open on the host machine but fail from other workstations.
• Verify Data fails or Rebuild Data stalls when it reaches the damaged transaction.
• The error appeared after a crash, power loss, or abrupt shutdown.

Common causes

• A transaction record that was partially written when QuickBooks closed unexpectedly.
• Disk problems — bad sectors or a failing drive — that corrupted part of the .QBW.
• Network instability in multi-user mode interrupting a write to the file.
• A very large file where accumulated index damage finally blocked a read.

What you can safely try first

Before anything else, make a copy of the company file and work only on the copy — opening a damaged file repeatedly can overwrite records that are still good. On the copy, run Verify Data to confirm the damage, then try Rebuild Data. If you keep a recent backup or a matching .TLG transaction log from before the error, restoring it is often the cleanest route. Test the file locally rather than over the network. If Rebuild loops or cannot complete, stop and avoid further forced opens.

When professional recovery is the safer path

A C=315 that survives Verify and Rebuild needs the unreadable transaction repaired at the data level, which the in-app tools cannot do. Our engineers read past the damaged record, repair or reconstruct it, and return a file that opens cleanly, all in-house in North America and never shipped overseas, backed by our no-data, no-charge guarantee. See how QuickBooks data recovery works, or start a recovery.