>>>This line of code causes my report to flash onto the screen and then disappear.
>>>It's been a while since I created a report, but I think a line such as the one below used to work. Have I made an error for the very first time in my coding career?
>>>

>>>Report Form incident For Alltrim(crimetype) = "Vandalism" PREVIEW
>>>

>>
>>Maybe you don't have 'Vandalism' anymore? :)
>
>I wish!;-) It's in the table.

I would still try:
Report Form incident For Alltrim(mytable.crimetype) = "Vandalism" PREVIEW
Who knows, maybe it's not your vandalism :)