A GAMSPy++ license must use IncrementalMode=1

Hello,
I newly installed gams and am trying to get it to work right now. It seems like I have set up my license correctly, if I run “gams” from shell, the license is displayed, and is says that it is valid:

*** The installed license is valid.
*** Expiration date of time-limited license (GAMS base module) : Nov 16, 2025
*** Note: For solvers, other expiration dates may apply.

However when I try to solve an example problem, I get an error, as shown below. Does anyone of you know how to resolve this?

Thank you
Anton

anton@anton-VirtualBox:~/Documents/test$ gams trnsprt.gms
— Job trnsprt.gms Start 11/28/24 16:01:08 48.3.0 71b5641f LEX-LEG x86 64bit/Linux
— Applying:
/opt/gams/gams48.3_linux_x64_64_sfx/gmsprmun.txt
— GAMS Parameters defined
Input /home/anton/Documents/test/trnsprt.gms
ScrDir /home/anton/Documents/test/225a/
SysDir /opt/gams/gams48.3_linux_x64_64_sfx/
*** A GAMSPy++ license must use IncrementalMode=1
*** Status: Terminated due to a licensing error
*** License file: /opt/gams/gams48.3_linux_x64_64_sfx/gamslice.txt
*** Inspect listing file for more information.
— Job trnsprt.gms Stop 11/28/24 16:01:08 elapsed 0:00:00.006

The listing file (I assume its trnsprt.lst?) also doesn’t contain more useful information:
**** A GAMSPy++ license must use IncrementalMode=1
**** Terminated due to a licensing error
**** License file: /opt/gams/gams48.3_linux_x64_64_sfx/gamslice.txt

**** Current license content:
// displays my license here

Hi,

GAMS and GAMSPy licenses are two different things. You cannot use a GAMSPy license to run GAMS models. Make sure that you have the correct license type.