I just installed Cactus and einsteintoolkit.th ran without any problem. However, I tried to run WaveDemo thorn and it showed some problems (please see the attached image). 

I really don't know how to fix such errors, so I hope you can help me with this.

I appreciate your support.

Pdta: I am working in LinuxMint 18.1 Serena.

Best regards,

Mauricio Suárez

Departamento de Física

Universidad Nacional de Colombia