diff --git a/uapi/apidata.py b/uapi/apidata.py
index a53f5e4..8687fa6 100644
--- a/uapi/apidata.py
+++ b/uapi/apidata.py
@@ -114,6 +114,10 @@ where b.orgid = c.ownerid
 	async def get_calluserid(self, appid, orgid=None):
 		users = await self.get_apiusers(appid, orgid=orgid)
 		cnt = len(users)
+		if cnt < 1:
+			e = Exception(f'get_calluserid():{appid=}, {orgid=} return None')
+			exception(f'{e}')
+			raise e
 		i = randint(0, cnt - 1)
 		return users[i].userid