Index: /trunk/pswarp/src/pswarpDefine.c
===================================================================
--- /trunk/pswarp/src/pswarpDefine.c	(revision 25740)
+++ /trunk/pswarp/src/pswarpDefine.c	(revision 25741)
@@ -65,4 +65,9 @@
         int numCols = psMetadataLookupS32(NULL, hdu->header, "NAXIS1"); ///< Number of columns
         int numRows = psMetadataLookupS32(NULL, hdu->header, "NAXIS2"); ///< Number of rows
+	if ((numCols == 0) || (numRows == 0)) {
+            psError(PS_ERR_UNKNOWN, false, "skycell has invalid dimensions %d x %d", numCols, numRows);
+            psFree(view);
+            return false;
+        }
 
         pmCell *target = pmFPAviewThisCell(view, output->fpa); ///< Target cell