How to fix QuickBooks Error Code C=51 ? from Diana Smith's blog

Are you struggling to fix Quickbooks error C=51. QuickBooks Error Code C=51 is a database error which arrives when quickbooks fails to find the TxList. Occurrence of QuickBooks Error Code C=51 stops the Quickbooks from functioning. It may also delete some of the important Quickbooks files. 

Causes:
Quickbooks verification may be having issues. 
There may be errors while you update Quickbooks. 

Before fixing Quickbooks Error C=51, you must have the following things:

1. Transaction log file. 
2. Corrupted .QBW file. 
3. Backup of the Quickbooks data file. 

To get rid of Quickbooks error C=51:

1. You need to rebuild and verify the data from the Quickbooks’ file menu and once this is done, you need to restart your system. 
2. Update the Quickbooks to the latest release of the Quickbooks. 

And this is it!! Hope Quickbooks is now free from Quickbooks Error Code C=51. For any issues, you can reach out to Quickbooks enterprise support at 1-888-485-0289.