Better error message when trying to use "multi" function on models other than MDPs.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@8232 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/explicit/StateModelChecker.java

@@ -507,6 +507,8 @@ public class StateModelChecker extends PrismComponent
 		case ExpressionFunc.MOD:
 		case ExpressionFunc.LOG:
 			return checkExpressionFuncBinary(model, expr);
+		case ExpressionFunc.MULTI:
+			throw new PrismException("Multi-objective model checking is not supported for " + model.getModelType() + "s");
 		default:
 			throw new PrismException("Unrecognised function \"" + expr.getName() + "\"");
 		}

prism/src/prism/StateModelChecker.java

@@ -714,6 +714,8 @@ public class StateModelChecker implements ModelChecker
 		case ExpressionFunc.MOD:
 		case ExpressionFunc.LOG:
 			return checkExpressionFuncBinary(expr);
+		case ExpressionFunc.MULTI:
+			throw new PrismException("Multi-objective model checking is not supported for " + model.getModelType() + "s");
 		default:
 			throw new PrismException("Unrecognised function \"" + expr.getName() + "\"");
 		}