Crystal Report's report loading forever

I've some Crystal reports in a VS2010 application. They all work fine, but sometimes (happened at least twice), they will stay on the hourglass without ever loading. If I launch another instance of the application and generate the report (while the other instance still loads), it works fine. If the non-working instance generates another report, it works fine. If the form is closed and reopened, it works fine.

So what may go wrong? There should be a timeout if there's an issue accessing the datasource.

开发者_运维百科Is this a bug or a known issue? I haven't found any info on that.

Is there a way to catch this "error" so the user doesn't waste his time for half an hour and then call me?

Cheers

To catch problems like this you may need to add logging code to your app. Make sure the Log function includes a time stamp, Pseudo code:

Log("pre-DB connect)
...DB connection
Log("post-DB connect)

Log("pre-Load Report...")
...load the report
Log("post-Load Report")

Once you narrow it down to a section of code, you can add more logging code to that section until hopefully, you zero in on the line that is hanging.