Index: /trunk/FACT++/gui/RawEventsViewer/RawEventsViewer.cc
===================================================================
--- /trunk/FACT++/gui/RawEventsViewer/RawEventsViewer.cc	(revision 17007)
+++ /trunk/FACT++/gui/RawEventsViewer/RawEventsViewer.cc	(revision 17008)
@@ -561,5 +561,8 @@
     }
     vector<string> entriesToCheck;
-    entriesToCheck.push_back("NAXIS2");
+    if (inputFile->IsCompressedFITS())
+        entriesToCheck.push_back("ZNAXIS2");
+    else
+        entriesToCheck.push_back("NAXIS2");
     entriesToCheck.push_back("NROI");
     entriesToCheck.push_back("REVISION");
@@ -591,5 +594,9 @@
     }
 
-    nRows =          inputFile->HasKey("NAXIS2") ? inputFile->GetInt("NAXIS2") : 0;
+    nRows = 0;
+    if (inputFile->IsCompressedFITS())
+        nRows = inputFile->HasKey("ZNAXIS2") ? inputFile->GetInt("ZNAXIS2") : 0;
+    else
+        nRows = inputFile->HasKey("NAXIS2") ? inputFile->GetInt("NAXIS2") : 0;
     nRoi =           inputFile->HasKey("NROI") ?  inputFile->GetInt("NROI") : 0;
     runNumber =      inputFile->HasKey("RUNID") ?  inputFile->GetInt("RUNID") : -1;