QBSDKLOG.txt -- Quickbooks SDK Log file
The qbsdklog.txt is located in the following folder depending on the version of Windows/Quickbooks
- For QuickBooks 2008 or later: C:\Documents and Settings\All Users\Application Data\Intuit\QuickBooks\qbsdklog.txt
- For QuickBooks 2007 or earlier: C:\Program Files\Common Files\Intuit\QuickBooks\qbsdklog.txt