diff --git a/prism/src/prism/Prism.java b/prism/src/prism/Prism.java
index c63d419f..56af142b 100644
--- a/prism/src/prism/Prism.java
+++ b/prism/src/prism/Prism.java
@@ -1884,7 +1884,7 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 					currentModel = expf2mtbdd.build(explicitFilesStatesFile, explicitFilesTransFile, explicitFilesLabelsFile, currentModulesFile,
 							explicitFilesNumStates);
 				} else {
-					throw new PrismException("Explicit import not yet supported for explicit engine");
+					throw new PrismNotSupportedException("Explicit import not yet supported for explicit engine");
 				}
 				break;
 			default:
@@ -2086,7 +2086,7 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 		JDDNode tmp;
 
 		if (getExplicit())
-			throw new PrismException("Export to Spy file not yet supported by explicit engine");
+			throw new PrismNotSupportedException("Export to Spy file not yet supported by explicit engine");
 
 		// Build model, if necessary
 		buildModelIfRequired();
@@ -2117,7 +2117,7 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 	public void exportToDotFile(File file) throws FileNotFoundException, PrismException
 	{
 		if (getExplicit())
-			throw new PrismException("Export to Dot file not yet supported by explicit engine");
+			throw new PrismNotSupportedException("Export to Dot file not yet supported by explicit engine");
 
 		// Build model, if necessary
 		buildModelIfRequired();
@@ -2180,7 +2180,7 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 				currentModelExpl.exportToPrismExplicitTra(tmpLog);
 				break;
 			case Prism.EXPORT_MATLAB:
-				throw new PrismException("Export not yet supported");
+				throw new PrismNotSupportedException("Export not yet supported");
 			case Prism.EXPORT_DOT:
 				currentModelExpl.exportToDotFile(tmpLog);
 				break;
@@ -2189,7 +2189,7 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 				break;
 			case Prism.EXPORT_MRMC:
 			case Prism.EXPORT_ROWS:
-				throw new PrismException("Export not yet supported");
+				throw new PrismNotSupportedException("Export not yet supported");
 			}
 			tmpLog.close();
 		}
@@ -2222,7 +2222,7 @@ public class Prism extends PrismComponent implements PrismSettingsListener
 		String s;
 
 		if (getExplicit())
-			throw new PrismException("Export of state rewards not yet supported by explicit engine");
+			throw new PrismNotSupportedException("Export of state rewards not yet supported by explicit engine");
 
 		// rows format does not apply to vectors
 		if (exportType == EXPORT_ROWS)