Scorm error experienced with Firefox browser, 'Call Method:003_blocklist ShowItem undefined' then cannot navigate within the scorm player have to close it. 

Hello,
this seems to be a problem with your learning object. You could try to load the sample learning object you find here to check if the player works correctly.

bye,
Giovanni.

Hello,
this seems to be a problem with your learning object. You could try to load the sample learning object you find here to check if the player works correctly.

bye,
Giovanni.

You hit the nail right on the head. I was having the same problem as the Op but your tip fixed it. Thanks so much :)

Sumanto Naskarcragm