problems with FrmRemoveObject

[Jennifer Fell]

Here is a piece of code which gets executed when removing a object that has 
a number of popup lists. These lists are dynamically created in that 
object's constructor function. Anyway, this FrmRemoveObject crashes in some 
specific situations. I know it's impossible to tell what's going on without 
looking at the codes, but still I wonder if anybody can guess what could 
possibly cause this problem. FYI,

frmP = FrmGetFormPtr (MainForm);
for (i = 0; i < TOTAL_LISTS; i++) {
   lstId = popupLists[i].lstId;
   objId = FrmGetObjectIndex (frmP, lstId);
   FrmRemoveObject (&frmP, objId);            //CRASHES HERE
   ctlId = popupLists[i].ctlId;
   objId = FrmGetObjectIndex (frmP, ctlId);
   FrmRemoveObject (&frmP, objId);
}
Thanks,
Jenni
Just in case you are curious about the construction process, here is a 
portion of the constructor function where I am creating the object (there 
mightbe some typo errors):

lastRsrcId = 2000;
for (i = 0; i < TOTAL_LISTS; i++) {
   if (!CtlNewControl ((void**)&frmP, ++lastRsrcId,
                                  popupTriggerCtl, NULL, // control type, 
textP
                                  0, 0, maxWidth, 0,        // x, y, width, 
height
                                  stdFont, NULL, true) {  // font, group, 
leftAnchor
        ErrDisplay ("Memory ERROR!");
        return;
   }
   popupLists[i].ctlId = lastRsrcId;
   if (LstNewList ((void**)&frmP, ++lastRsrcId,
                            0, 0, maxWidth, 0, stdFont, 3, // x, y, width, 
height, font, visibleItems
                            popupLists[i].popupBox[popupBox].ctlId)) { // 
triggerId
        ErrDisplay ("Memory ERROR!");
        return;
   }
   popupLists[i].lstId = lastRsrcId;
} 

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