Solved: Error: unknown type name 'intptr_t' during project conversion from CVI2012 to CVI2019 - NI Community
![Error: Unknown type name "I2CSlave" MAX32620FTHR - Application development - Arm Mbed OS support forum Error: Unknown type name "I2CSlave" MAX32620FTHR - Application development - Arm Mbed OS support forum](https://global.discourse-cdn.com/standard17/uploads/mbed/optimized/1X/03f26613a96a36caa28ac2f8e1bf8634fe34fd52_2_1024x548.png)
Error: Unknown type name "I2CSlave" MAX32620FTHR - Application development - Arm Mbed OS support forum
![Unknown type name lv_indev_drv_t and include of main esp32 component from lvgl_drivers - Get started - LVGL Forum Unknown type name lv_indev_drv_t and include of main esp32 component from lvgl_drivers - Get started - LVGL Forum](https://forum.lvgl.io/uploads/default/original/2X/a/a4d31e585a4ee19b6ff2bc7f97d0e258b4995d98.png)
Unknown type name lv_indev_drv_t and include of main esp32 component from lvgl_drivers - Get started - LVGL Forum
![uint8_t is marked as unknown type name and Serial.xxx is marked as undeclared id - IDE 2.x - Arduino Forum uint8_t is marked as unknown type name and Serial.xxx is marked as undeclared id - IDE 2.x - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/d/5/7/d576f8f0ab8caa809295cfce39cea8d2c06ee6b3.png)
uint8_t is marked as unknown type name and Serial.xxx is marked as undeclared id - IDE 2.x - Arduino Forum
![c++ - Unknown Type name 'class'; did you mean Class'? ERROR on CCApplicationProtocol.h, CCApplication.h and Expected ';' after top level declarator ERROR - Stack Overflow c++ - Unknown Type name 'class'; did you mean Class'? ERROR on CCApplicationProtocol.h, CCApplication.h and Expected ';' after top level declarator ERROR - Stack Overflow](https://i.stack.imgur.com/cA6ke.png)
c++ - Unknown Type name 'class'; did you mean Class'? ERROR on CCApplicationProtocol.h, CCApplication.h and Expected ';' after top level declarator ERROR - Stack Overflow
![M13-RA6M3-EK. error: unknown type name 'IRQn_Type'. - Forum - RA MCU - Renesas Engineering Community M13-RA6M3-EK. error: unknown type name 'IRQn_Type'. - Forum - RA MCU - Renesas Engineering Community](https://community.renesas.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/256/7563.pastedimage1684411915574v1.png)