Error "Exception has been thrown by the target of an invocation" in MathCad Prime 10

You should attach the worksheet, not only a picture, and state which version of Prime you are using.

All i can see in your picture is that:

- alpha and beta are undefined.

- There appears to be a multiplication symbol (*) missing:

    - in the first differential equation, between C(s) and (mu.m...)

    - in the other two DE's between D and (1+R.1), which makes D seem like a function.

For alpha=beta=1, I get:

Success!
Luc