Dear Hussain,
In WebNMS(formally AdventNet ) SNMP Agent Toolkit C Edition 6.3.0, once the agent is started, the value of the generated text file will be read and loaded in the global vector.
When SNMP GETREQUEST operation is performed, the agent will process the request and requested node value will taken from the global vector. If the request is successful, the response is sent to the manager from agent.
The value of the node can be updated or modified only by SNMP SET OPERATION during runtime. SET OPERATION will update the value in global vector and also in the respective text file.
Any manual change in the generated text file or any other method to change the value of node will be reflected only after the agent is restarted.
Hope this helps to solve your query,
Thanks & Regards,
Balaji.V.G.