error on nlift

[shimonfrancis]

No description provided.

[shimonfrancis]

I get this error when i plot my gcp's
Error using nlinfit (line 239)
No usable observations after removing NaNs in Y and in the result of evaluating MODELFUN at the initial value BETA0.

Error in initUAVAnalysis (line 42)
beta = nlinfit(xyz,[UV(:,1); UV(:,2)],'findUVnDOF',in.beta0);

Error in sampleAerielleVideoDemoPIX (line 93)
[betas(1,:),meta.refPoints] = initUAVAnalysis(I, gcp, inputs, meta);