Details

This message is generated when the derivatives of the first argument in FindRoot are singular at the indicated point.
This error can occur if the starting point is a minimum or a maximum of one of the functions for which roots are to be computed.
This error can also occur if the first argument is constant.
When doing finite element analysis on a Mac computer with Apple silicon hardware, a missing "PARDISO" solver can be the cause of this message. Running the Wolfram System under Rosetta can resolve the issue.
Off[message] switches off the message; On[message] switches it on. For example: Off[FindRoot::jsing].

Examples

The starting point is a minimum of the function in the first argument:

Wolfram Language code: FindRoot[x ^ 2 - 3 == 0, {x, 0}]

A root is found without difficulty if a different starting value is used:

Wolfram Language code: FindRoot[x ^ 2 - 3 == 0, {x, 1}]

This function does not have a root:

Wolfram Language code: FindRoot[1, {x, 1}]

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