Index: trunk/ippToPsps/src/ippToPspsBatchTest.c
===================================================================
--- trunk/ippToPsps/src/ippToPspsBatchTest.c	(revision 28531)
+++ trunk/ippToPsps/src/ippToPspsBatchTest.c	(revision 28559)
@@ -138,4 +138,6 @@
     long removeList[MAXDETECT];
     long thisObjId;
+    bool firstTimeIn = true;
+    int ippIDetNum, instMagNum, instMagErrNum, peakMagNum;
 
     // loop round all 60 chips
@@ -222,9 +224,24 @@
             s = d = totalDetections = invalidDvoRows = smfJumps = unmatched = 0;
 
+            // determine column numbers for certain IPP detection columns
+            if (firstTimeIn) {
+
+                status=0;fits_get_colnum(fitsIn, CASESEN, "IPP_IDET", &ippIDetNum, &status);
+                if (status) psError(PS_ERR_IO, false, "Unable to read col num for IPP_IDET");
+                status=0;fits_get_colnum(fitsIn, CASESEN, "PSF_INST_MAG", &instMagNum, &status);
+                if (status) psError(PS_ERR_IO, false, "Unable to read col num for PSF_INST_MAG");
+                status=0;fits_get_colnum(fitsIn, CASESEN, "PSF_INST_MAG_SIG", &instMagErrNum, &status);
+                if (status) psError(PS_ERR_IO, false, "Unable to read col num for PSF_INST_MAG_SIG");
+                status=0;fits_get_colnum(fitsIn, CASESEN, "PEAK_FLUX_AS_MAG", &peakMagNum, &status);
+                if (status) psError(PS_ERR_IO, false, "Unable to read col num for PEAK_FLUX_AS_MAG");
+
+                firstTimeIn=false;
+            }
+
             anynull = 0;
-            fits_read_col(fitsIn, TLONG, 1, 1, 1, nDet, &longnull, ippIDet, &anynull, &status);
-            fits_read_col(fitsIn, TFLOAT, 8, 1, 1, nDet, &floatnull, instMag, &anynull, &status);
-            fits_read_col(fitsIn, TFLOAT, 9, 1, 1, nDet, &floatnull, instMagErr, &anynull, &status);
-            fits_read_col(fitsIn, TFLOAT, 12, 1, 1, nDet, &floatnull, peakMag, &anynull, &status);
+            fits_read_col(fitsIn, TLONG, ippIDetNum, 1, 1, nDet, &longnull, ippIDet, &anynull, &status);
+            fits_read_col(fitsIn, TFLOAT, instMagNum, 1, 1, nDet, &floatnull, instMag, &anynull, &status);
+            fits_read_col(fitsIn, TFLOAT, instMagErrNum, 1, 1, nDet, &floatnull, instMagErr, &anynull, &status);
+            fits_read_col(fitsIn, TFLOAT, peakMagNum, 1, 1, nDet, &floatnull, peakMag, &anynull, &status);
 
             // DVO detections are ordered by IPP_IDET, which increments from 0 in SMF table