Print_media function does not work constantly

Anvil Q&A
1

Dear guys,

I cannot put this post into bug reports, therefore I list it here. In my case the anvil.media call print_media seems to not work constantly. At first the below showed code works fine until some timeout (after 15-30 minutes) an internal error arises (code below). Do anybody of you know what the reason could be or if this function is still in process?

CODE SNIPET:

try:
   print('Before printing')
   anvil.media.print_media(resp)
   print('After printing')
except Exception as e:
   print('Error printing bill media',e)

CONSOLE OUTPUT:

  • Before printing
  • [An internal error has occurred] - see browser console for more details
  • TypeError: Cannot set properties of null (setting 'onload') at t.onclick (https://anvil.works/runtime-new/runtime/js/runner.bundle.js?sha=1d34bbf7955d709194fa6f33c295a7c7d7ca27deed452172d385f2a7192b0741:346:413) at Arguments.<anonymous> (https://anvil.works/runtime-new/runtime/js/runner.bundle.js?sha=1d34bbf7955d709194fa6f33c295a7c7d7ca27deed452172d385f2a7192b0741:346:506) at Sk.misceval.chain (https://anvil.works/runtime-new/runtime/js/lib/skulpt.min.js?sha=2b09aa0590c8a83c7a4a5fbee77f64faf07023095aff414e73e1de34f0526383:473:454) at $meth (https://anvil.works/runtime-new/runtime/js/runner.bundle.js?sha=1d34bbf7955d709194fa6f33c295a7c7d7ca27deed452172d385f2a7192b0741:346:71) at sk_method.$callOneArg (https://anvil.works/runtime-new/runtime/js/lib/skulpt.min.js?sha=2b09aa0590c8a83c7a4a5fbee77f64faf07023095aff414e73e1de34f0526383:315:449) at $date_link_click60790$ (eval at <anonymous> (https://anvil.works/runtime-new/runtime/js/lib/skulpt.min.js?sha=2b09aa0590c8a83c7a4a5fbee77f64faf07023095aff414e73e1de34f0526383:1089:392), <anonymous>:526:42) at susp.resume (eval at <anonymous> (https://anvil.works/runtime-new/runtime/js/lib/skulpt.min.js?sha=2b09aa0590c8a83c7a4a5fbee77f64faf07023095aff414e73e1de34f0526383:1089:392), <anonymous>:373:1826) at l (https://anvil.works/runtime-new/runtime/js/lib/skulpt.min.js?sha=2b09aa0590c8a83c7a4a5fbee77f64faf07023095aff414e73e1de34f0526383:471:443) at n (https://anvil.works/runtime-new/runtime/js/lib/skulpt.min.js?sha=2b09aa0590c8a83c7a4a5fbee77f64faf07023095aff414e73e1de34f0526383:472:1)
  • After printing
2

I haven’t tried print_media(), but when printing from Firefox, sometimes Firefox locks up, and sometimes Firefox locks up the printer. Could this be your problem?

3

In my case it occured in Chrome. I also tried it with another library where everything works fine so most likely it has something to do with print_media(). But thanks for your response!

4

I’m experiencing this error consistently in Chrome and Safari after publishing. It works in preview mode in the Anvil IDE. The form I’m producing with print_media is dense. It only has a few pages, but it includes aprox. 400 textboxes and 11 pictures. An suggestions on how get around this problem? Many thanks.

5

Replaced the call to anvil.media.print_media(my_pdf) with anvil.media.download(my_pdf) and that solved the problem.