Inconsistent file prefix causing error when interpreting SCORM package

When a SCORM 1.2 package is created and uploaded into a Microsoft LMS365, an error suggesting that invalid filename prefix is used. It appears that most of the file items in the SCORM 1.2 zipped file contains regular filename (ie that starts with an alphabet) and for those which are not, starts with an underscore symbol ie '_". There are a few file items where the first character begins with a dot '.', which causes an error while uploading the SCORM package.

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This is the first time we hear of these kinds of problems. I'll have a look.