Symptom:
When attempting to run a report, an error message states: 'Failed to Create the Crystal Query Engine'.

Solution 1:
There may be mismatched Crystal report DLLs in the system32 directory.Rename the CRPE32.DLL file in the C:\Windows\System32 directory to CRPE32.DLL.OLD and reinstall the program.  A new CRPE32.DLL file will be installed that should match all the other dll versions.

Solution 2:

You may have Crystal Reports installed and the dll needs to be re-registered.
1. Quit Crystal Reports.
2. On the Windows taskbar, click the 'Start' button and then click 'Run'.
3. Type: 'regsvr32 "C:\Windows\System32\crqe.dll"'.
4. Click 'OK'.

A message appears indicating the file is successfully registered. If the file does not register correctly, try solutions 2.

Note:
You may need to locate the crqe.dll if it is not in the c:\windows\system32 direcotry. In this case, on the Windows taskbar, click the 'Start' button > Find (or Search) > Files and Folders. Enter crqe.dll and perform search. Note the location and substitue the path to register this file.