QuickBooks error codes 6000 77 occurs when you are try to open a company file but that file is damaged.
How to troubleshoot QuickBooks error codes 6000 77 ?
1. Rename configuration files
.nd and .tlg files are the configuration files which are used to open a company file to access QuickBooks. When these configuration files are corrupted or damaged, you would not be able to open company file and QuickBooks will show QuickBooks error codes 6000 77. If you rename these configuration files, no data will be lost in the process that you have saved in the QuickBooks company file.
read completely to resolve QuickBooks error codes 6000 77
2. Check the damage in the QuickBooks installation You need to check whether a particular company file which is not being opened, is damaged or the whole QuickBooks installation has been corrupted. To check this, open a sample company file. If it does not open and returns an error, that means QuickBooks installation is damaged. In this case, QuickBooks installation needs to be repaired. If this is not the case, follow next solution.
3. Also check the problem in the location of file
Sometimes it may happen that problem persists because of the location where the QuickBooks file is saved. To enquire this, copy the company file on the desktop and try to open it. If the file gets opened, it indicates the location of company file is damaged or file path exceeds the limit. Thus, file may be used and opened by changing the location of file. If it still does not open, company file is damaged.