diff --git a/library/Misc_Helpers.ttcn b/library/Misc_Helpers.ttcn
index cbc1e70..fd2e7bb 100644
--- a/library/Misc_Helpers.ttcn
+++ b/library/Misc_Helpers.ttcn
@@ -79,4 +79,24 @@
 	return count;
 }
 
+type record of charstring ro_charstring;
+function f_str_split(charstring str, charstring delim := "\n") return ro_charstring
+{
+	var integer pos := 0;
+	var ro_charstring parts := {};
+	var integer delim_pos;
+	var integer end := lengthof(str);
+	while (pos < end) {
+		delim_pos := f_strstr(str, delim, pos);
+		if (delim_pos < 0) {
+			delim_pos := end;
+		}
+		if (delim_pos > pos) {
+			parts := parts & { substr(str, pos, delim_pos - pos) };
+		}
+		pos := delim_pos + 1;
+	}
+	return parts;
+}
+
 }
diff --git a/library/Osmocom_VTY_Functions.ttcn b/library/Osmocom_VTY_Functions.ttcn
index 6b0883f..b982a8f 100644
--- a/library/Osmocom_VTY_Functions.ttcn
+++ b/library/Osmocom_VTY_Functions.ttcn
@@ -274,26 +274,7 @@
 	Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "talloc count mismatch");
 }
 
-public function f_str_split(charstring str, charstring delim := "\n") return ro_charstring
-{
-	var integer pos := 0;
-	var ro_charstring parts := {};
-	var integer delim_pos;
-	var integer end := lengthof(str);
-	while (pos < end) {
-		delim_pos := f_strstr(str, delim, pos);
-		if (delim_pos < 0) {
-			delim_pos := end;
-		}
-		if (delim_pos > pos) {
-			parts := parts & { substr(str, pos, delim_pos - pos) };
-		}
-		pos := delim_pos + 1;
-	}
-	return parts;
-}
-
-public function f_verify_talloc_bytes(TELNETasp_PT pt, ro_charstring object_strs, integer expect_bytes := 0,
+public function f_verify_talloc_bytes(TELNETasp_PT pt, Misc_Helpers.ro_charstring object_strs, integer expect_bytes := 0,
 				       integer attempts := 5, float wait_time := 3.0)
 {
 	var charstring show_cmd := "show talloc-context application brief";
@@ -302,7 +283,7 @@
 		attempts := attempts - 1;
 		var charstring ret := f_vty_transceive_ret(pt, show_cmd);
 
-		var ro_charstring lines := f_str_split(ret);
+		var Misc_Helpers.ro_charstring lines := f_str_split(ret);
 
 		var boolean ok := true;
 		for (var integer i := 0; i < lengthof(object_strs); i := i + 1) {
@@ -315,7 +296,7 @@
 				if (f_strstr(line, object_str) < 0) {
 					continue;
 				}
-				var ro_charstring tokens := f_str_split(line, " ");
+				var Misc_Helpers.ro_charstring tokens := f_str_split(line, " ");
 				if (lengthof(tokens) < 4) {
 					continue;
 				}
diff --git a/upf/UPF_Tests.ttcn b/upf/UPF_Tests.ttcn
index 140e81b..cb8c489 100644
--- a/upf/UPF_Tests.ttcn
+++ b/upf/UPF_Tests.ttcn
@@ -125,7 +125,7 @@
 	if (not f_get_name_val(token, str, name)) {
 		return false;
 	}
-	var ro_charstring nrl := f_str_split(token, delim);
+	var Misc_Helpers.ro_charstring nrl := f_str_split(token, delim);
 	if (lengthof(nrl) != 2) {
 		return false;
 	}
@@ -270,7 +270,7 @@
 
 private function f_vty_get_gtp_actions(TELNETasp_PT vty_pt) return GTP_Action_List {
 	var charstring gtp_str := f_vty_transceive_ret(vty_pt, "show gtp");
-	var ro_charstring lines := f_str_split(gtp_str, "\n");
+	var Misc_Helpers.ro_charstring lines := f_str_split(gtp_str, "\n");
 	var GTP_Action_List gtps := {};
 	for (var integer i := 0; i < lengthof(lines); i := i + 1) {
 		var charstring line := lines[i];
@@ -399,7 +399,7 @@
 
 private function f_vty_get_sessions(TELNETasp_PT vty_pt) return PFCP_Session_Status_List {
 	var charstring sessions_str := f_vty_transceive_ret(vty_pt, "show session");
-	var ro_charstring lines := f_str_split(sessions_str, "\n");
+	var Misc_Helpers.ro_charstring lines := f_str_split(sessions_str, "\n");
 	var PFCP_Session_Status_List sessions := {};
 	for (var integer i := 0; i < lengthof(lines); i := i + 1) {
 		var charstring line := lines[i];
@@ -483,7 +483,7 @@
 	setverdict(pass);
 }
 
-private function f_vty_netinst_cfg(TELNETasp_PT vty_pt, ro_charstring netinst_cmds)
+private function f_vty_netinst_cfg(TELNETasp_PT vty_pt, Misc_Helpers.ro_charstring netinst_cmds)
 {
 	f_vty_enter_config(vty_pt);
 	f_vty_transceive(vty_pt, "netinst");