https://community.cloudera.com/t5/Support-Questions/Using-Apache-Nifi-How-can-you-perform-a-mathematical/m-p/285271#M211726 <P>Hey Matt, thank you so much<BR />I've set up that flow but I'm having trouble on the actual updateattribute function I'm applying:<BR />${COUNTFILES:minus(31)}</P><P>I'm using this and it's not modifying the value.&nbsp;</P><P>Could you please help?</P> Tue, 10 Dec 2019 17:14:47 GMT fowler7878 2019-12-10T17:14:47Z