cacti(Associated Data Queries) Could not find data query XML file at

枫影谁用了

增加一可Linux主机的时候，Associated Data Queries下面所有图都无法以生成，DUBUG的时候显示

+ Executing SNMP walk for data @ '.1.3.6.1.2.1.4.20.1.2'
+ Found item [ifIP='127.0.0.1'] index: 1 [from regexp oid parse]
+ Found item [ifIP='128.3.0.30'] index: 2 [from regexp oid parse]
+ Found data query XML file at '/var/www/html/cacti/resource/snmp_queries/interface.xml'
+ Found data query XML file at '/var/www/html/cacti/resource/snmp_queries/interface.xml'
+ Could not find data query XML file at ''

google有些朋友说是SNMP Version的问题，我试过SNMP Version 1 2 都一样的结果。

Associated Graph Templates又可以正常。

这个机器(cacti)有绘十多台服务器及多台路由器均无问题，就是这台Linux有这样的问题。

请问问题会出在那里呢？