NIntegrate::eincr

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This message is generated by the method "GlobalAdaptive" before it stops the integration in the cases when the global error estimate oscillates too much. The global error is expected to decrease monotonically after a certain number of integration steps. The message is given after NIntegrate::slwcon.
Off[message] switches off the message; On[message] switches it on. For example: Off[NIntegrate::eincr].

An example of a highly oscillatory integral that makes the global error estimate oscillate:

A correct result can be obtained with a larger maximum number of error increases:

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