Details

This message is generated when a transformation applied by Simplify or FullSimplify was aborted before returning.
This message warns that Simplify or FullSimplify did not use all of the transformations that it would normally apply.
This message does not necessarily indicate an error.
Off[message] switches off the message; On[message] switches it on. For example: Off[FullSimplify::time].

Examples

One of the transformations requires more than one second on the computer that was used for this example:

Wolfram Language code: Simplify[1 + Cos[x] ^ 99 - Sin[x] ^ 99, TimeConstraint -> 1]

Trigonometric transformations can be excluded using the Trig->False option:

Wolfram Language code: Simplify[1 + Cos[x] ^ 99 - Sin[x] ^ 99, TimeConstraint -> 1, Trig -> False]

The same message can be generated by FullSimplify:

Wolfram Language code: FullSimplify[1 + Cos[x] ^ 99 - Sin[x] ^ 99, TimeConstraint -> 1]

Specific transformations can be excluded in FullSimplify using the ExcludedForms option:

Wolfram Language code: FullSimplify[1 + Cos[x] ^ 99 - Sin[x] ^ 99, TimeConstraint -> 1, ExcludedForms -> {_Cos, _Sin}]

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