diff --git a/llmage/asyncinference.py b/llmage/asyncinference.py
index 39d6d24..3895544 100644
--- a/llmage/asyncinference.py
+++ b/llmage/asyncinference.py
@@ -147,10 +147,13 @@ async def query_task_status(request, upappid, apinames, luid, userid, taskid):
 				if rzt.status == 'SUCCEEDED':
 					if llm.ppid:
 						try:
-							chargings = await llm_charging(sor, 
+							charging = await llm_charging(sor, 
 												llm.ppid, llmusage)
-							llmusage.amount = chargings.amount
-							llmusage.cost = chargings.cost
+							if charging:
+								llmusage.amount = charging.amount
+								llmusage.cost = charging.cost
+							else:
+								llmusage.amount = cost = 0.0
 						except Exception as e:
 							e = Exception(f'{llm.pid} charging error{e}')
 							exception(f'{e}')
diff --git a/llmage/llmclient.py b/llmage/llmclient.py
index 73381f7..d388cfd 100644
--- a/llmage/llmclient.py
+++ b/llmage/llmclient.py
@@ -97,8 +97,11 @@ async def uapi_request(request, llm, sor, callerid, callerorgid, params_kw=None)
 		if llm.ppid and callerorgid:
 			try:
 				chargings = await llm_charging(sor, llm.ppid, llmusage)
-				llmusage.amount = chargings.amount
-				llmusage.cost = chargings.cost
+				if chargings:
+					llmusage.amount = chargings.amount
+					llmusage.cost = chargings.cost
+				else:
+					llmusage.amount = llmusage.cost = 0.00
 			except Exception as e:
 				e = Exception(f'{llm.pid} charging error{e}')
 				exception(f'{e}')
diff --git a/llmage/syncinference.py b/llmage/syncinference.py
index 740077a..5ee92bc 100644
--- a/llmage/syncinference.py
+++ b/llmage/syncinference.py
@@ -59,9 +59,12 @@ async def sync_uapi_request(request, llm, sor, callerid, callerorgid, params_kw=
 		llmusage.status = 'SUCCEEDED'
 		if llm.ppid:
 			try:
-				chargings = await llm_charging(sor, llm.ppid, llmusage)
-				llmusage.amount = chargings.amount
-				llmusage.cost = chargings.cost
+				charging = await llm_charging(sor, llm.ppid, llmusage)
+				if charging:
+					llmusage.amount = charging.amount
+					llmusage.cost = charging.cost
+				else:
+					llmusage.amount = llmusage.cost = 0.0
 			except Exception as e:
 				e = Exception(f'{llm.pid} charging error{e}')
 				exception(f'{e}')