Compilation error on model deletion -- case of model inter-dependency.

Hello all,

In my Dynamics AX 2012 R2, I have two axmodels X& Y.

X has class xclass, while Y has class yclass.

xclass has method xmethod, while yclass has method ymethod.

Now I remove (delete) model Y from the AX environment.

Then I inserted a check inside xmethod (model X) that:-

1. if model Yis installed then,
   • from xmethod in xclass, i am calling yclass constructor and calling ymethod thereafter.
2. if model Y is not present then,
   • from xmethod in xclass, i am printing "hello world".

Now, my issue is, once model Y is removed and I give a full compile, a compilation error comes up with message 'variable ymethod has not been declared' and/or'yclass is not a class'.

Please help. Is there any way to achieve this? I guess its a fundamental concept and I am missing out on something.