Details

This message is generated by numerical functions when the value of the WorkingPrecision option is greater than the precision of the argument function.
It is not possible to do a proper high-precision calculation starting with low-precision inputs.
This message can be avoided by using exact or high-precision numbers in the input.
This message is often encountered when the argument function includes an inexact zero (0.0). The precision of 0.0 is zero (0.0 has no nonzero significant digits), which is less than the default value of the WorkingPrecision option.
This message is a warning only and can often be ignored if you are not concerned about the precision used in your calculations.
Off[message] switches off the message; On[message] switches it on. For example: Off[General::precw].

Examples

The precision of the machine number is less than the specified value of WorkingPrecision:

The message can be avoided by using exact numbers in the input:

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