Apparently Intuit made a bigger change in the underlying database than we had been told. They moved from Sybase 11 up to Sybase 16.  Along the way, something was broken. HOPEFULLY this is the only break, but we don't know yet.  Right now, the following error ONLY has been reported by those using QuickBooks Enterprise 16.0

If an SDK add-on program performs a "customer query" (which ALL of our programs do), QuickBooks will crash.

Word is that it is going to take Intuit awhile to get this fixed - probably with the release of R4P (which has historically been late November to mid-December).

There is a workaround if you encounter this issue. You want to edit the QBSDK.INI file on EACH computer where the 3rd party program is installed.

Here are the instructions from Intuit:

Go to C:\ProgramData\Intuit\QuickBooks.  Find and edit the qbsdk.ini file.

If you can't find the file, or directory do a Start - Run - "C:\ProgramData\Intuit\QuickBooks" <enter> and then edit qbsdk.ini.

If the qbsdk.ini is not there, just create it using Notepad.  The file should contain the following information, with the last line being the most important one.

[Log]
Level=info
UnlimitedSize=N
[Parser]
DumpRequestData=N
SdkAccelerator=N

You can avoid this error by NOT installing QuickBooks Enterprise 16 - and it's exactly things like this that prompt me to warn people not to be the first to upgrade to the new version!