I guess you would have to script (in the master or parameter script) something that calculates the length of each component.
These values could then be saved to parameters and these can be listed in an interactive schedule.
I have no idea what “an abacas” is, but if you need the data in an external program you can write it out as a text file.
But you really need to know what you are doing in GDL – this is not for a novice.
Versions 6.5 to 22
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision M6800 - i7 4700MQ @ 2.40GHz, 16GB RAM, AMD FirePro M6100 (2GB), Windows 7 64bit