https://community.nxp.com/t5/LPC-Microcontrollers/Red-Exclamation-With-Files-In-rt-core-folder/m-p/1172075#M42678 <P>Thanks for working on the problem for me. I am using Win10, LPC51U68 MCU and Link2. I upgrade 2 files (.project and .cproject) today and the icon shows a red ‘!’. I suspect it means ‘not push’ up to app. If so, could you please advise how to fix it? Thank you!</P> Thu, 22 Oct 2020 23:37:36 GMT running_gao 2020-10-22T23:37:36Z https://community.nxp.com/t5/LPC-Microcontrollers/Red-Exclamation-With-Files-In-rt-core-folder/m-p/1172075#M42678 <P>Thanks for working on the problem for me. I am using Win10, LPC51U68 MCU and Link2. I upgrade 2 files (.project and .cproject) today and the icon shows a red ‘!’. I suspect it means ‘not push’ up to app. If so, could you please advise how to fix it? Thank you!</P> Thu, 22 Oct 2020 23:37:36 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Red-Exclamation-With-Files-In-rt-core-folder/m-p/1172075#M42678 running_gao 2020-10-22T23:37:36Z https://community.nxp.com/t5/LPC-Microcontrollers/Red-Exclamation-With-Files-In-rt-core-folder/m-p/1172310#M42684 <P>I use win10 but don't have your problem. how to show the green tick and red&nbsp;exclamatory mark? How to reproduce your issue?</P> <P>Can your project work normally with MCUXpresso IDE now?</P> <P>&nbsp;</P> <P>Have a nice day</P> <P>Jun Zhang</P> Fri, 23 Oct 2020 08:16:29 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Red-Exclamation-With-Files-In-rt-core-folder/m-p/1172310#M42684 ZhangJennie 2020-10-23T08:16:29Z