QuickBooks error code C=43 signals dangerous database instability, often from network failures or file damage. Immediately disconnect all users, verify server connections, and attempt portable company file creation. Your financial data is at risk - contact QuickBooks Disaster Recovery at 855-888-3080
https://www.metooo.io/e/fix-it-or-nix-it-your-guide-to-quickbooks-error-code-c-43
