Javascript error: Cannot cast

Hello Experts,

this thread should be in stackoverflow but trying my luck here. Need help on javascript.

I wrote a script as below,

function z_checking_users_assigned(par) {

    var posMSKEY = uGetEntryID();

    var currentIDStore = "%$glb.SAP_MASTER_IDS_ID%";

    uWarning("Position MSKEY: " + posMSKEY);

    var sql = "select mcthismskey from idmv_link_ext2 where mcThisOcName = 'MX_PERSON' and mcothermskey = " + posMSKEY;

    var userMSKEY = uSelect(sql);

    uWarning("userMSKEY from database: " + userMSKEY);

    if (userMSKEY.indexOf("!ERROR") >= 0) {

        uError(userMSKEY);

    } else {

        uWarning("Entering the length check");

        var attributeArray = userMSKEY.split("!!");

        var l = attributeArray.length;

        uWarning("Length of vector is: " + l);

        if (l > 1) {

            uWarning("Length is greater than 1, so setting global variable");

            uSetGlobalVar("POS_MSKEY", posMSKEY);

            var OutString = uRunJobNow(360);

            uWarning("Result of Scheduling: " + OutString);

            uSkip(1);

        }

    }

}

I get attached error.

its executing till uWarning() line. I assume its the condition statement if(l>1) is causing the issue. Please help on this regard.

I tried if(l>parseInt("1",10)

and also var l = parseInt(attributeAray.length,10)

still same error

Kind regards,

Jai