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Error on line XX when importing IIF Files

When importing an IIF file, you may see an error message with format:

Error on Line XX: (Message varies)

Why this is happening
The error message and root cause will vary based on the information that is being imported here are a few examples:

Error on line XX: You can’t change the type of an account.

Occurs when the account […]


Error: C=343 when opening QuickBooks

When you open QuickBooks, you receive the following error message:

Filename.dll is not an executable file

Or, when trying to register msxml3.dll or msxml4.dll from the command line of a 64 bit machine:

No registration helper is registered for this file type.

Why this is happening
Your Windows operating system’s Microsoft Core XML Services DLL (MSXML.dll) file is missing, damaged, […]