Click on a link and returned page is blank

It worked a couple of days ago, now it’s broken.

I have a control app that you choose a date and then click OK and it sc_redir() to another application. However, nothing comes up, except the index.php file.

This usually means that I have an error in my code, but I have parsed the _apl file through PHP Storm, And I only got errors in generated source and I think all of that was just the way SC does things. There were no obvious errors of syntax, so I am stumped.

Is there anything I should do? I switched on debug, but nothing appears.

Thanks
Tony

After you click OK…Is the Blank page the control app or the page you are redirecting to?
Paste the events code here and let us take a look.
Sometimes a stray ; can cause havoc and no debugger catches it.

On inspecting the screen (IFrame) it shows the title of the application and not the control.
Sadly, there is like 1400 lines of hand code, which make it difficult to show you. My previous experiences have shown me that something like a missing character (that may have been deleted accidentally) can present you with a blank page.

Color coding of the code seems fine, and I have parsed it through PHP Storm that shows errors up for you, so it will be a laborious few days of one line at a time, until I find it. I know it works that is the main thing, I just have to find that unexpected item.