Initial guess leads to undefined function value

Problem Description

An error "Initial guess leads to undefined function value" occurs.

Solution

This error message usually appears when you have set up an expression that returns “not a value”; that is, it is undefined for the initial condition you have set. For instance, this happens if an expression contains a divisor that becomes zero or a logarithm of a negative value. To solve such a problem, change the expression or the initial value so that the expression is well-defined when substituting the initial value of the variables. Also, watch out for warnings in the Log window.

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