diff --git a/src/convrnx.c b/src/convrnx.c
index 61b901677..3ad29c202 100644
--- a/src/convrnx.c
+++ b/src/convrnx.c
@@ -1312,6 +1312,36 @@ static int convrnx_s(int sess, int format, rnxopt_t *opt, const char *file,
         /* open stream file */
         if (!open_strfile(str,epath[i])) continue;
 
+        // Reinitialize the input state.
+        if (str->format == STRFMT_RTCM2 || str->format == STRFMT_RTCM3) {
+            free_rtcm(&str->rtcm);
+            if (!init_rtcm(&str->rtcm)) {
+                showmsg("init rtcm error");
+                for (int i = 0; i < MAXEXFILE; i++) free(epath[i]);
+                free_strfile(str);
+                return 0;
+            }
+            strcpy(str->rtcm.opt, opt->rcvopt);
+        } else if (str->format <= MAXRCVFMT) {
+            free_raw(&str->raw);
+            if (!init_raw(&str->raw, str->format)) {
+                showmsg("reinit raw error");
+                for (int i = 0; i < MAXEXFILE; i++) free(epath[i]);
+                free_strfile(str);
+                return 0;
+            }
+            strcpy(str->raw.opt, opt->rcvopt);
+        } else if (format == STRFMT_RINEX) {
+            free_rnxctr(&str->rnx);
+            if (!init_rnxctr(&str->rnx)) {
+                showmsg("reinit rnx error");
+                for (int i = 0; i < MAXEXFILE; i++) free(epath[i]);
+                free_strfile(str);
+                return 0;
+            }
+            strcpy(str->rnx.opt, opt->rcvopt);
+        }
+
         /* input message */
         for (j=0;(type=input_strfile(str))>=-1;j++) {