diff --git a/src/cluster_reader.c b/src/cluster_reader.c
index 2be9298..4207c72 100644
--- a/src/cluster_reader.c
+++ b/src/cluster_reader.c
@@ -84,7 +84,7 @@ int read_clusters_with_cut(FILE *fp, int64_t n_clusters, Cluster *buf, int *n_le
 	  if (good) {
 	    ptr++;
 	    nph_read++;
-	    *n_left--;
+	    (*n_left)--;
 	  }
 	  if (nph_read >= n_clusters)
 	    break;
@@ -94,8 +94,10 @@ int read_clusters_with_cut(FILE *fp, int64_t n_clusters, Cluster *buf, int *n_le
     if (nph_read < n_clusters) {
         // keep on reading frames and photons until reaching n_clusters
         while (fread(&iframe, sizeof(iframe), 1, fp)) {
+	  //printf("%d\n",nph_read);
 
 	  if (fread(&nph, sizeof(nph), 1, fp)) {
+	    //printf("** %d\n",nph);
 	    *n_left = nph;
 	    for (int iph=0; iph<nph; iph++) {
 	      // read photons 1 by 1
@@ -118,7 +120,7 @@ int read_clusters_with_cut(FILE *fp, int64_t n_clusters, Cluster *buf, int *n_le
 	      if (good) {
 		ptr++;
 		nph_read++;
-		*n_left--;
+		(*n_left)--;
 	      }
 	      if (nph_read >= n_clusters)
 		break;
@@ -130,7 +132,7 @@ int read_clusters_with_cut(FILE *fp, int64_t n_clusters, Cluster *buf, int *n_le
 	    break;
 	}
     }
-
+    //printf("%d\n",nph_read);
     assert(nph_read <= n_clusters); // sanity check in debug mode
     return nph_read;
 }
diff --git a/test.py b/test.py
index 29dc96b..0d69015 100644
--- a/test.py
+++ b/test.py
@@ -1,14 +1,14 @@
 from creader import ClusterFileReader, clusterize
 import numpy as np
 
-# maxph=100000000
-maxph=100
+maxph=100000000
+#maxph=100
 
 from pathlib import Path
 fpath = Path("/mnt/sls_det_storage/moench_data/Moench_LGAD_SIM_Nov22/moenchLGAD202211/clustW17new/beam_En800eV_-40deg_300V_10us_d0_f5_0.clust")
 # r = ClusterFileReader()
-a=np.zeros([400,400])
-#a=None #np.array([])
+#a=np.zeros([400,400])
+a=None #np.array([])
 
 r = ClusterFileReader(fpath.as_posix())
 a=r.read(maxph,a)