QBD Error - "A QuickBooks Company Data File Is Already Open and It Is Different From the One Requested or There Are Multiple Company Files Open"

Explanation: This means the wrong QuickBooks account is open for the Web Connector instance that you are running or that you have multiple companies open at once.

How to Fix:

• Close down QuickBooks to make sure there aren't any unexpected instances running
  • Tip: using your computer's task manager can help you locate any hidden running programs

• Reopen QuickBooks with the location you are trying to run the Web Connector for

• Run the Web Connector by checking the box of the instance that needs to run and then click “Update Selected”