Licensce not found

Hi
I wrote a VB6 application about 20 years ago (W2000) which has been running pretty much OK through XP, W7 and now (just about) with W10. For the first time in over 10 years I`ve had to go under the hood to make a minor adjustment.
On compiling however I`m gett ing a message "License information for this component not found.You do not have an appropriate license to use this functionality in the design environment"
I don`t know which component it is referring to.
Any pointers please: I`m obviously well out of practice on this stuff