diff --git a/console/nii_dicom.h b/console/nii_dicom.h
index 60e5fd84..4278b7e4 100644
--- a/console/nii_dicom.h
+++ b/console/nii_dicom.h
@@ -50,7 +50,7 @@ extern "C" {
 #define kCPUsuf " " // unknown CPU
 #endif
 
-#define kDCMdate "v1.0.20241111"
+#define kDCMdate "v1.0.20241127"
 #define kDCMvers kDCMdate " " kJP2suf kLSsuf kCCsuf kCPUsuf
 
 static const int kMaxEPI3D = 1024; // maximum number of EPI images in Siemens Mosaic
diff --git a/console/nii_dicom_batch.cpp b/console/nii_dicom_batch.cpp
index ed9a4e2d..a9d09bbd 100644
--- a/console/nii_dicom_batch.cpp
+++ b/console/nii_dicom_batch.cpp
@@ -6691,6 +6691,11 @@ void checkSliceTiming(struct TDICOMdata *d, struct TDICOMdata *d1, int verbose,
 			printWarning("Siemens MoCo? Bogus slice timing (range %g..%g, TR=%g seconds)\n", minT1, maxT1, TRms);
 		return;
 	}
+	if (((d->isLocalizer) || (d->isDerived)) && ((minT1 == maxT1) || (maxT1 >= TRms))) {
+		//no need to store or report non-sensical slice times for derived or localizers
+		d->CSA.sliceTiming[0] = -1.0;
+		return;
+	}
 	if ((!d->isLocalizer) && ((minT1 == maxT1) || (maxT1 >= TRms))) { // both first and second image corrupted
 		printWarning("Slice timing appears corrupted (range %g..%g, TR=%g ms)\n", minT1, maxT1, TRms);
 		return;