In some situations, users of Intuit Statement Writer (ISW) may encounter a problem where the program fails to open properly. Intuit Statement Writer is a financial report writer introduced along with QuickBooks 2009 that makes use of Microsoft Excel.
After clicking on the Intuit Statement Writer menu selection, Microsoft Excel opens to a blank spreadsheet and displays the fatal error message:
Unable to open statement: System.ArgumentException: Invalid license number
Here’s a screen shot of the exact error message:
According to Intuit, this error occurs because the file iswruntime.dat contains an incorrect license number; the error has only been observed on computers running Windows Vista.
To fix this error message, simply rename or delete iswruntime.dat, which is located in the C:ProgramDataIntuitStatement Writer folder. When Intuit Statement Writer next starts, it will re-create a new file.
This error message is discussed in this Intuit knowledge base article.