I'm using netxms and I think that its great. I have the next problem:
I have some switches cisco 2960, I want to create a template to poll consumed ram from them
I checked cisco documentation and I know that I can get used ram wid oid ".1.3.6.1.4.1.9.9.48.1.1.1.5.1" and free ram with oid ".1.3.6.1.4.1.9.9.48.1.1.1.6.1"
those oid are not tables. The problem is that I dont have a oid to poll used ram in percentage so I create an script that I called SNMPOperations wich calculate percentage consumed.
I have tried this in several ways and I can't figure out what is wrong.
For example:
If I create the script with the function GetValueSNMP that recive a node object and return consumed ram (in percentage)

Script version 1:
sub GetValueSNMP(parameter)
{
    transport = CreateSNMPTransport(parameter);  // "parameter" is a node object
    usedRAM = SNMPGetValue(transport, ".1.3.6.1.4.1.9.9.48.1.1.1.5.1");
    freeRAM = SNMPGetValue(transport, ".1.3.6.1.4.1.9.9.48.1.1.1.6.1");
    totalRAM = usedRAM + freeRAM;
    usedRAMPercentage = ((usedRAM * 100)/totalRAM);
    return usedRAMPercentage;
}
I'm calling previous script in TransformationTab (doesn't work) and Instance Discovery(doesn't work)  in the following way:

use SNMPOperations;
return GetValueSNMP($node);

Script version 2:
    transport = CreateSNMPTransport($node);
    usedRAM = SNMPGetValue(transport, ".1.3.6.1.4.1.9.9.48.1.1.1.5.1");
    freeRAM = SNMPGetValue(transport, ".1.3.6.1.4.1.9.9.48.1.1.1.6.1");
    totalRAM = usedRAM + freeRAM;
    usedRAMPercentage = ((usedRAM * 100)/totalRAM);
    return usedRAMPercentage;
I'm using previous script in Instance Discovery(doesn't work)

I dont know if the script is wrong, or If I'm doing something wrong on dci template.
Please your help.