Failure to save updated project data

What are the reasons for failure to save updates to a project involving photos and music ?

Is there a size limit in bytes which causes Nero 14 platinum to crash / abend / stop working when saving updates to a project ?

Here is the message: "Nero Video has experienced a serious problem and must close immediately" when requesting "save" or "save as" (or if automatic save has started).

The first and most fundamental feature of any software is to save reliably data that has been entered.

Windows 7 professional operating system
Nero 14 platinum
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