Save of project file crashes, and project file is invalid with zero size

[magnesj]

A user worked on calculator expressions, and one particular expression caused issues ECFCO2_m:= (CO2_mobile_in_gas_Mt)*1e+9/(DENG*DX*DY*PORO)

The user was not able to generate the result, and the result did not appear in the Generated folder. When saving the project, the project file was not written, and resinsight crashed. This could be related to file system issues, as the calculator expression has been used successfully for other grid models.

The error message Reading stored results: The storage file has wrong type was written to terminal, but the timing of this error message related to saving of Resinsight project file is unknown.

[magnesj]

Possibly related issue #10489