I want to use AMPL student version. also I apply its IDE for mathematical modelling, but when I open it, it pop-up a box showing the following message.
A valid AMPL license file could not be found for this machine.
For assistance, copy this entire message and send it to licensing@ampl.com.
Details:
License file ampl.lic not found anywhere in $PATH.
What can I do to fix this issue?
The AMPL IDE distribution available for download from http://www.ampl.com/IDE/ includes a full version of ampl which requires a license. To use the student version, you need to replace the ampl and solver binaries in the amplide/ampl directory with their student versions available here.
Alternatively, you can download a demo version of the IDE from one of the following locations: