Re: pileup:help

Bulent KIZILTAN <bulent_at_email.domain.hidden>I have tried to model some piled up data. I keep getting an error message
>like:
[...]
>Current parameter values and their derivatives
>yielded a singular matrix
>Chi-square minimization failed

This means that two or more parameters are not independent.  What
parameters are you varying?  (Use list_par to find out).

Thanks,
--John
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