diff --git a/src/class_portstarObj.py b/src/class_portstarObj.py
index 246b2ed..42f6d67 100644
--- a/src/class_portstarObj.py
+++ b/src/class_portstarObj.py
@@ -1992,10 +1992,12 @@ def _mapPredictions(self, map_predict, imgOutPrefix, chunk, npzs):
                 dst.write(out)
                 dst=None
 
+
         # Reopen and warp to xres
         gtiff = gtiff_temp.replace('temp', '')
         gdal.Warp(gtiff, gtiff_temp, xRes = pix_res, yRes = pix_res, targetAlignedPixels=True)
 
+
         os.remove(gtiff_temp)
 
         return
diff --git a/src/main_mapSubstrate.py b/src/main_mapSubstrate.py
index 74daa5f..b1ca97a 100644
--- a/src/main_mapSubstrate.py
+++ b/src/main_mapSubstrate.py
@@ -521,6 +521,14 @@ def map_master_func(logfilename='',
     if map_predict > 0:
         start_time = time.time()
 
+        # Reduce to avoid OOM
+        threadPrcnt = 0.75
+        if threadCnt == cpu_count():
+            threadCnt = int(threadCnt * threadPrcnt)
+
+            print("\nPrediction Map requires a lot of RAM...")
+            print("Lowering threadCnt to:", threadCnt)
+
         if map_predict == 1:
             a = 'probability'
         else: