diff --git a/src/bin/jp2/convertbmp.c b/src/bin/jp2/convertbmp.c
index 78ca4af5..910574b8 100644
--- a/src/bin/jp2/convertbmp.c
+++ b/src/bin/jp2/convertbmp.c
@@ -903,6 +903,10 @@ int imagetobmp(opj_image_t * image, const char *outfile) {
         <<-- <<-- <<-- <<-- */
 
         fdest = fopen(outfile, "wb");
+        if (!fdest) {
+            fprintf(stderr, "ERROR -> failed to open %s for writing\n", outfile);
+            return 1;
+        }
         w = (int)image->comps[0].w;
         h = (int)image->comps[0].h;
 
diff --git a/src/bin/jp2/convertpng.c b/src/bin/jp2/convertpng.c
index 5a72d9fe..0999edbf 100644
--- a/src/bin/jp2/convertpng.c
+++ b/src/bin/jp2/convertpng.c
@@ -486,7 +486,7 @@ fin:
 	}
 	fclose(writer);
 	
-	if(fails) remove(write_idf);
+	if(fails) (void)remove(write_idf); /* ignore return value */
 	
 	return fails;
 }/* imagetopng() */
diff --git a/src/bin/jp2/opj_compress.c b/src/bin/jp2/opj_compress.c
index d3dc62ff..e5f98532 100644
--- a/src/bin/jp2/opj_compress.c
+++ b/src/bin/jp2/opj_compress.c
@@ -456,7 +456,7 @@ static char get_next_file(int imageno,dircnt_t *dirptr,img_fol_t *img_fol, opj_c
     if (parameters->decod_format == -1)
         return 1;
     sprintf(infilename,"%s/%s",img_fol->imgdirpath,image_filename);
-    strncpy(parameters->infile, infilename, sizeof(infilename));
+    strncpy(parameters->infile, infilename, sizeof(infilename) - 1U);
 
     /*Set output file*/
     strcpy(temp_ofname,get_file_name(image_filename));
@@ -466,7 +466,7 @@ static char get_next_file(int imageno,dircnt_t *dirptr,img_fol_t *img_fol, opj_c
     }
     if(img_fol->set_out_format==1){
         sprintf(outfilename,"%s/%s.%s",img_fol->imgdirpath,temp_ofname,img_fol->out_format);
-        strncpy(parameters->outfile, outfilename, sizeof(outfilename));
+        strncpy(parameters->outfile, outfilename, sizeof(outfilename) - 1U);
     }
     return 0;
 }
@@ -612,6 +612,9 @@ static int parse_cmdline_encoder(int argc, char **argv, opj_cparameters_t *param
                 substr2++; /* skip '@' character */
             }
             substr1 = (char*) malloc((len+1)*sizeof(char));
+            if (substr1 == NULL) {
+                return 1;
+            }
             memcpy(substr1,opj_optarg,len);
             substr1[len] = '\0';
             if (sscanf(substr1, "%d,%d,%d,%d,%c", &width, &height, &ncomp, &bitdepth, &signo) == 5) {
@@ -663,7 +666,7 @@ static int parse_cmdline_encoder(int argc, char **argv, opj_cparameters_t *param
                     }
                 }
             }
-            if (substr1) free(substr1);
+            free(substr1);
             if (wrong) {
                 fprintf(stderr,"\nError: invalid raw image parameters\n");
                 fprintf(stderr,"Please use the Format option -F:\n");
diff --git a/src/bin/jp2/opj_decompress.c b/src/bin/jp2/opj_decompress.c
index da566ac2..bd755c82 100644
--- a/src/bin/jp2/opj_decompress.c
+++ b/src/bin/jp2/opj_decompress.c
@@ -1550,7 +1550,7 @@ int main(int argc, char **argv)
 		/* destroy the codestream index */
 		opj_destroy_cstr_index(&cstr_index);
 
-		if(failed) remove(parameters.outfile);
+		if(failed) (void)remove(parameters.outfile); /* ignore return value */
 	}
 	destroy_parameters(&parameters);
 	if (numDecompressedImages) {
diff --git a/src/bin/jp2/opj_dump.c b/src/bin/jp2/opj_dump.c
index a85cfe90..4005f1c2 100644
--- a/src/bin/jp2/opj_dump.c
+++ b/src/bin/jp2/opj_dump.c
@@ -134,6 +134,7 @@ static int get_num_images(char *imgdirpath){
 			continue;
 		num_images++;
 	}
+	closedir(dir);
 	return num_images;
 }
 
@@ -160,6 +161,7 @@ static int load_images(dircnt_t *dirptr, char *imgdirpath){
 		strcpy(dirptr->filename[i],content->d_name);
 		i++;
 	}
+	closedir(dir);
 	return 0;	
 }