compile error : cmake 3.10 gcc (Ubuntu 7.5.0-3ubuntu1~18.04)

[j2innet]

compile error :
cmake 3.10
gcc (Ubuntu 7.5.0-3ubuntu1~18.04)

LMedS.hpp: toolEstimator is undefined

[romen-h]

this->toolEstimator should fix it.

GCC Manual: Name lookup, templates, and accessing members of base classes