You have not shown us a small, self-contained example that reproduces the problem.

Most likely, the problem is that your datastructure is not what you think it is, and/or it doesn't match the way your code tries to use it. In the code path leading up to the problematic line, you output the variables $RC and< c>$cds</c> and others. Maybe you can share the values that you see there with us.

Also very good for visualizing a data structure is the module Data::Dumper. Print out what Perl has as your data structure using

use Data::Dumper;
print Dumper \%hash_geno_group;

[download]

If the output from Data::Dumper is too large, reduce the data you store into %hash_geno_group and store only the data where the problem happens.

In reply to Re: Can't use string ("0") as a HASH ref while "strict refs" problem by Corion
in thread Can't use string ("0") as a HASH ref while "strict refs" problem by etricaen

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