Can I call the a dataserver event inside a dataserver event?

Scenario:

A settings notecard is being read by my script. The settings notecard contains the name of a second notecard in the object to be used by the script.

I would like the script to then get the number of lines in that second notecard.

I can't seem to get it to work no matter how I try, and I think it's because I'm trying to call a dataserver event inside the dataserver event where I get the second notecard name from the first notecard.

Any ideas?

SL scripts are unithread = they only execute one instruction at any given time. If the script is currently reading the name of the second notecard from the first notecard, it can't be running a second event at the same time (instead, the "next events" triggered at the time are just piling up in a queue and get called one after the other when the current event finishes). There are ways to simulate the parallel running of two or more events at the same time, but they don't exactly fix your problem

You'll have to use one of these solutions:
1) establish a preliminary list of the number of lines of each notecard in the inventory of the object at startup, for later use
2) store a "step" number in a global variable to call the event multiple times in a row so that everytime it runs, it can increment this variable and continue where it left.

Aaron - yes you can. In fact you probably are already - This is the standard way to read everything but the first line of a notcard (see the llGetNotecardLine example)
Can you post a code snippet showing the problem?

I try.

string secondNotecard;
key LineKeyOnfirstNotecard;
key NumLineKeyOnsecondNotecard;

default
{
    touch_start(integer total_number)
    {
        LineKeyOnfirstNotecard = llGetNotecardLine("FirstNotecard", 0);
    }
    dataserver(key query_id, string data)
    {
        if(query_id == LineKeyOnfirstNotecard)
        {
            secondNotecard = data;    //To use this in the llOwnerSay part.
            NumLineKeyOnsecondNotecard = llGetNumberOfNotecardLines(secondNotecard);
        }
        if(query_id == NumLineKeyOnsecondNotecard)
        {
            llOwnerSay("The number of " + secondNotecard + "'s lines are " + data);
        }
    }
}

why would you want to read inventory off of a notecard ?
http://secondlife.com/badgeo/wakka.php?wakka=llGetInventoryName