Evaluate the Safety, Tolerability, Biodistribution and Anti Tumour Activity of 177LU-OPS201 With Companion Imaging 68Ga-OPS202 PET/CT in Previously Treated Subjects With Locally Advanced or Metastatic Cancers Expressing Somatostatin Receptor 2 (SSTR2)

Radioactivity delivered in 2 administrations (cycles): one loading dose followed by a lower maintenance dose, 6 weeks apart until progression or unacceptable toxicity (up to 4 additional cycles could be administered depending on efficacy and tolerability).

Imaging companion: 1 administration at screening and one administration at End of core Trial cycle.