Perl: Math::BigInt does not support the as_hex method as documented

[ATC]

When using the Math::BigInt module, several of the methods mentioned in the documentation do not appear to exist.

[ATC]

You are most likely using an older version of the module, which supports only a small subset of the methods supported by more recent versions.

Update your Math::BigInt module to the current version, using the following command:

perl -MCPAN -e 'install Math::BigInt'