Hi ​@pasan.weerasinghe 

Hope the explanation in the documentation is enough to understand the behavior of this parameter

Configure Transport Connectors

Typically this parameter is useful if you are doing any file based integrations where one system writes to the IN directory and IFS reads the files continuously, or when handling large files where it takes some time to write the file to the disc.

Parameter description:

IGNORE_IF_NOT_FOUND

If ticked, read retry of a file that no longer exists will be ignored. Such situation can arise if the file has been removed or changed after it has been listed but before it has been read. See also file based reader considerations. If un-ticked a read attempt of a file that not exists will result in a failure leaving the corresponding entry in Connect Reader Queue with status Read Failed.

Regards,

Damith 

Thanks Damith