Hi
Im following a old maya 2013 tutorial.
Atm i try to build write a FK /IK snap script.

$r_upperArm = `xform -query -worldSpace -rotation leftUpperArm_FK_snap_JNT`;
xform -worldSpace -rotation $r_upperArm[0] $r_upperArm[1] $r_upperArm[2] leftUpperArm_FK_CTRL;

This is the old script.

xform -query -worldSpace -rotation leftUpperArm_FK_snap_JNT this part was working fine. But when i wanna store the xform into $r_upperArm its not working anymore.

Im using maya 2018 and tryed this version:

$r_upperArm = xform ("-query -worldSpace -rotation L_upperArm_FK_snap_JNT");
xform -worldSpace -rotation $r_upperArm[0] $r_upperArm[1] $r_upperArm[2] L_upperArm_FK_CTRL;

But im getting the error:
// Error: xform -worldSpace -rotation $r_upperArm[0] $r_upperArm[1] $r_upperArm[2] L_upperArm_FK_CTRL; //
// Error: Line 2.54: "$r_upperArm" is not an array. //
// Error: xform -worldSpace -rotation $r_upperArm[0] $r_upperArm[1] $r_upperArm[2] L_upperArm_FK_CTRL; //
// Error: Line 2.69: "$r_upperArm" is not an array. //
// Error: xform -worldSpace -rotation $r_upperArm[0] $r_upperArm[1] $r_upperArm[2] L_upperArm_FK_CTRL; //
// Error: Line 2.91: "$r_upperArm" is not an array. //

I new to mel scripting and rly hope somebody can help me ;D

best regards