02-10-2018, 10:41 PM
Update: Thanks to Pernille having provided the input files, the issue was resolved.
The difference in the model solvability was not caused by ANSWER versions, but by different TIMES versions, such that when running with v4.1.3 the model was feasible, due to a bug in that version of TIMES, while when running with v4.1.6−4.2.7 the model was correctly reported infeasible, due to the earlier bug having been fixed since TIMES v4.1.6.
The infeasibility was caused by FLO_FUNC being (apparently mistakenly) used for defining the fuel efficiency of each fuel within a group of input fuels, which were presumably meant to be substitutable input fuels.
The difference in the model solvability was not caused by ANSWER versions, but by different TIMES versions, such that when running with v4.1.3 the model was feasible, due to a bug in that version of TIMES, while when running with v4.1.6−4.2.7 the model was correctly reported infeasible, due to the earlier bug having been fixed since TIMES v4.1.6.
The infeasibility was caused by FLO_FUNC being (apparently mistakenly) used for defining the fuel efficiency of each fuel within a group of input fuels, which were presumably meant to be substitutable input fuels.