undefined reference to '_imp__ps3000aOpenUnit@8'

[izaskun]

Hello,
I want to connect with PicoScope model 3404B, using SDK with Eclipse. I have taken the example from the Github and comment all the calls to ps3000a functions. I can compile and run the program.
After that I have uncommented the first call: ps3000aOpenUnit() , and I get the compile error:
undefined reference to '_imp__ps3000aOpenUnit@8'

I think that the path to the library is well defined .... any idea of what happens ?
Thanks in advance