Merge branch 'Pyomo:main' into writers-improved-determinism

Author: jsiirola

Diff for: .github/workflows/test_branches.yml

@@ -255,7 +255,7 @@ jobs:
             python -m pip install --cache-dir cache/pip cplex docplex \
                 || echo "WARNING: CPLEX Community Edition is not available"
             python -m pip install --cache-dir cache/pip \
-                -i https://pypi.gurobi.com gurobipy \
+                -i https://pypi.gurobi.com gurobipy==10.0.3 \
                 || echo "WARNING: Gurobi is not available"
             python -m pip install --cache-dir cache/pip xpress \
                 || echo "WARNING: Xpress Community Edition is not available"
@@ -331,7 +331,7 @@ jobs:
         if test -z "${{matrix.slim}}"; then
             PYVER=$(echo "py${{matrix.python}}" | sed 's/\.//g')
             echo "Installing for $PYVER"
-            for PKG in 'cplex>=12.10' docplex gurobi xpress cyipopt pymumps scip; do
+            for PKG in 'cplex>=12.10' docplex 'gurobi=10.0.3' xpress cyipopt pymumps scip; do
                 echo ""
                 echo "*** Install $PKG ***"
                 # conda can literally take an hour to determine that a

Diff for: .github/workflows/test_pr_and_main.yml

@@ -285,7 +285,7 @@ jobs:
             python -m pip install --cache-dir cache/pip cplex docplex \
                 || echo "WARNING: CPLEX Community Edition is not available"
             python -m pip install --cache-dir cache/pip \
-                -i https://pypi.gurobi.com gurobipy \
+                -i https://pypi.gurobi.com gurobipy==10.0.3 \
                 || echo "WARNING: Gurobi is not available"
             python -m pip install --cache-dir cache/pip xpress \
                 || echo "WARNING: Xpress Community Edition is not available"
@@ -361,7 +361,7 @@ jobs:
         if test -z "${{matrix.slim}}"; then
             PYVER=$(echo "py${{matrix.python}}" | sed 's/\.//g')
             echo "Installing for $PYVER"
-            for PKG in 'cplex>=12.10' docplex gurobi xpress cyipopt pymumps scip; do
+            for PKG in 'cplex>=12.10' docplex 'gurobi=10.0.3' xpress cyipopt pymumps scip; do
                 echo ""
                 echo "*** Install $PKG ***"
                 # conda can literally take an hour to determine that a