Color palette table groopsPlot.cpt is empty

[ShaunFell]

Description

I'm executing a simple orbit scenario that compute the gravity gradient, then plotting using the PlotMap program. Everything executes just fine, however it outputs

--- PlotMap (groundtracks.png) ---
create temporary data files
create scriptfile
run scriptfile
psscale [ERROR]: Color palette table groopsPlot.cpt is empty
[Session gmt (0)]: Error returned from GMT API: GMT_CPT_READ_ERROR (8)
[Session gmt (0)]: Error returned from GMT API: GMT_CPT_READ_ERROR (8)
=== Finished GROOPS ===

to the screen. It creates the .png file, but there is not colorbar at the bottom, as I would expect. It seems the program cant find this 'groopsPlot.cpt' file. I've searched the repo and google for "groopsPlot.cpt" and the ftp server, but can't find it.

OS: Fedora 41
Kernel: x86_64 Linux 6.12.4-200.fc41.x86_64
GMT version: 6.5.0
g++: 14.2.1
groops version: 2024-06-24

GROOPS version

main (latest commit)

Operating systems

• Linux
• Windows
• macOS
• Other (please specify in the description)

Log output

2024-12-20 12:21:28 Status  === Starting GROOPS ===
2024-12-20 12:21:28 Info    Config file: </home/<user>/Documents/Github/groops/scenarios/testSimulateOrbit.xml>
2024-12-20 12:21:28 Status  --- PlotMap (groundtracks.png) ---
2024-12-20 12:21:28 Status  create temporary data files
2024-12-20 12:21:28 Status  create scriptfile
2024-12-20 12:21:28 Status  run scriptfile
2024-12-20 12:21:29 Status  === Finished GROOPS ===

[tmayerguerr]

Hi Shaun,

I don't think this is a bug, but that you have forgotten to set something.

If you do not set a min/max value in colorbar, the program tries to get these values from layer (e.g. layer->points->value). The color of the symbol must be <none>. Maybe the values are too small for GMT. Then you should convert it to other units (value=1e9*data0).

If you set PlotMap->options->removeFiles=no, the program creates a directory in your plot folder with all the data and the bash script with the GMT commands. There you can see what happens.

regards
Torsten