Release Times file format not specified

[rbwinst-usgs]

Describe the bug
In PRT models it says
"RELEASE_TIMESFILE—keyword indicating release times file name will follow
timesfile—name of the release times file. RELEASE_TIMES and RELEASE_TIMESFILE are mutually exclusive."
However, the format of a release times file is not specified and no examples are provided.

[rbwinst-usgs]

The TRACK_TIMESFILE format is also undescribed.

[rbwinst-usgs]

By experiment, it appears that the release times file must consist of a list of real numbers with one number per line. It isn't clear that the TRACK_TIMESFILE follows the same format because in a test, MODFLOW 6 crashed when I tried that.

[wpbonelli]

@rbwinst-usgs the same format should go for TRACK_TIMESFILE. The logic to parse the file is identical, or at least ought to be. Could you share the model that produces the crash? I will take a look.

Thanks for putting this through its paces.

[rbwinst-usgs]

modfied_ex-prt-mp7-p03.zip
Here is the example