Mapping Runtime Error

Hello,

We tried executing a scenario HTTP --> RFC with 25 virtual users simultaneously.

But I got following Error:

http://sap.com/xi/XI/Message/30" xmlns:SOAP=" http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="1">

<SAP:Category>XIServer</SAP:Category>

<SAP:Code area="MAPPING">JCO_COMMUNICATION_FAILURE</SAP:Code>

<SAP:P1>Error when opening an RFC connection</SAP:P1>

<SAP:P2 />

<SAP:P3 />

<SAP:P4 />

<SAP:AdditionalText />

<SAP:ApplicationFaultMessage namespace="" />

<SAP:Stack>&quot;COMMUNICATION FAILURE&quot; during JCo call. Error when opening an RFC connection</SAP:Stack>

<SAP:Retry>N</SAP:Retry>

</SAP:Error>

Can I increase the number of parallel processes in VisualAdmin >JCO RFC Provider >AI_RUNTIME_ to 300?

Or is there any other solution?

Please help to resolve this.

Thanks in advance.

Beena.