QuickBooks Error 6007 have attained grand attention from small and medium sized business, that owes to its irresistible and most relevant applications. But any software is prone to errors, so is QuickBooks. One of the most annoying error is Error code -6007. This QuickBooks error code generally occurs when you try to open the company file in single user mode, but the file is already being used. This error is also termed as QuickBooks sync manager issue. It is one of the most perplexing issue that is needed to be resolved immediately. Whenever this error occurs, you are unable to access your company file and company file or records. The most frequent reason for occurrence of this error is damaged company file. In this articleQBSsolved hasdiscussed about error 6007 and tried to provide you with the basic troubleshooting to avert this error. But before that, we will discuss the possible causes which results in occurrence of this error.