Error in <TClass::New>: cannot create object of class

ROOT
1

Dear experts,

running a compiled (and linked) application I get the error message
Error in TClass::New: cannot create object of class xyz
xyz is in the LinkDef file, there’s a ClassDef and a ClassImp, and there were no
error messages from cint or the linker.
What can be the reason for this error? Or, what mistake may I have done here?

Thanks,
Matthias

2

Your class is probably an abstract base class with pure functions.

Rene

3

Hi Rene,

yeah, I extended the base class and in this class the implementation of a virtual function
was missing.

Thanks,
Matthias

[quote=“brun”]Your class is probably an abstract base class with pure functions.

Rene[/quote]