Grdimage problem

hello everyone

I’m trying to plot a grid to visualize the topography on my map with grdimage but I get an error and I don’t know what I’m doing wrong. I leave my script. I hope someone can help me … thank you very much in advance. the grid I’m using is GMRTv3_9_20210610topo.grd and I download it from GMRT MapTool (728 Bytes)

You haven’t defined the TIERRA variable in your script.

Sorry!!..I deleted that part of my script because I don’t use it … but I still have the problem … Thank you (776 Bytes)