Hi Frans,

Thank you for the quick and clear response.

I won't use the WGS84 EPSG:28992 Amersfoort RDnew then.

As all my data (ascii files) is in degrees, I am able to run the model, but the scale is incorrect, and therefore the absolute results of the pathline simulation as well.

I still wonder if it is possible to change the default projection of iMOD to a projection in degrees?

As an alternative appraoch I've been able to transform the projection of all the original ascii files,

which serve as input for iMOD, to a projection in meters (I tried both WGS 1984 Plate Carree and Mollweide).

Now, after changing the model extent and the resolution to meters too, in the runfile, the command prompt is able to run iMODFLOW.

I've noticed a big difference in the command syntax however:

(1)

(2)

(1) represents the conventional process with a runfile, where one still has to deal with the scale disorder.

(2) presents the process where the input data is already transformed to a projection in meters.

There's seems to be no streamflow, as there are no head closure - cell calculations.

The results can still be run in iMOD, but unfortunately no flowpaths appear, and the *.iff file results in the following:

(3)

Particles are released, but no actual flowpath simulations occur.

The time values of 200 years, are simply there because I've set the maximum trace time at 200 yrs.

What do you think obstructs the calculations in the command prompt?

Or what do you think prevents the model from running pathline simulations?

Any thoughts or suggestions would be really appreciated!

Thank you in advance.

Bas