Projectfile: Improve error message when number of stresses doesn't match number of data entries

In the header of each 'package' in the PRJ file there is a number, referring to the total number of stresses (incl steady state) that follows. If the number is larger than the following data blocks an error is thrown:
"list index out of range
failed to parse date time for line 517 with content []
Error occurred for keyword: (drn)"

However, this error thrown might not be clear. At lease not for us. It took us some time to find out. The project file looked good at line 517.
Positive: the keyword (e.g. drn) is given and also the prj file line number. But the text was not clear for us.

is it possible to make the error more self-explanatory

Start with the PRJ parser's package-header handling and reproduce a file where the declared stress count exceeds the following data blocks. Compare the resulting message with the package keyword, such as drn, and the reported line; done when the error clearly explains the count mismatch rather than only reporting an index or date-time failure.