Dear Materials Studio Users,

I want to read the coordinates of two atoms named "R1" and "R2" to calculate the angle with the axis, part of the perl script is as follows:

my \\\$atoms = \\\$Documents{"polymer.xsd"}->AsymmetricUnit->Atoms;

foreach my \\\$atom (@\\\$atoms) {
 
  my \\\$atom1 = \\\$atom->Name = ("R1");
  my \\\$atom2 = \\\$atom->Name = ("R2");
 
my \\\$anglevalue = CalcAngle(\\\$atom1->XYZ, \\\$atom2->XYZ);
\\\$angle = \\\$anglevalue;
 
write;
}

However, I get the error information that "Can't locate object method "XYZ" via package "R1" (perhaps you forgot to load "R1"?) at -e line 68." How to fix this problem?

Thank you.