I misspelled the Arduino.h and and removed it from the code as recommended.
Still I have problems and doing a deep dive into Libraries.
I think this is the error associated with the libraries TCA9548A, and Adafruit_AHT10. as shown the verbose compellation output:
Detecting libraries used...
"C:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino5/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\cores\arduino" "-IC:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\variants\standard" "C:\Users\jgmor\AppData\Local\Temp\arduino-sketch-3AC2EB01025F276FCF46DB7637E563AC\sketch\TCA and AHT V4.ino.cpp" -o nul
Alternatives for TCA9548A.h: [TCA9548A@1.1.3]
ResolveLibrary(TCA9548A.h)
**** -> candidates: [TCA9548A@1.1.3]****
"C:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino5/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\cores\arduino" "-IC:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\variants\standard" "-IC:\Users\jgmor\OneDrive\Documents\Arduino\libraries\TCA9548A\src" "C:\Users\jgmor\AppData\Local\Temp\arduino-sketch-3AC2EB01025F276FCF46DB7637E563AC\sketch\TCA and AHT V4.ino.cpp" -o nul
Alternatives for Wire.h: [Wire@1.0]
ResolveLibrary(Wire.h)
**** -> candidates: [Wire@1.0]****
"C:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino5/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\cores\arduino" "-IC:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\variants\standard" "-IC:\Users\jgmor\OneDrive\Documents\Arduino\libraries\TCA9548A\src" "-IC:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\libraries\Wire\src" "C:\Users\jgmor\AppData\Local\Temp\arduino-sketch-3AC2EB01025F276FCF46DB7637E563AC\sketch\TCA and AHT V4.ino.cpp" -o nul
Alternatives for Audrino.h: []
ResolveLibrary(Audrino.h)
**** -> candidates: []****
****Using library TCA9548A at version 1.1.3 in folder: C:\Users\jgmor\OneDrive\Documents\Arduino\libraries\TCA9548A ****
****Using library Wire at version 1.0 in folder: C:\Users\jgmor\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.2\libraries\Wire ****
Compilation error: Error: 2 UNKNOWN: exit status 1
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The TCA9548A is in the C:\Users\jgmor\OneDrive\Documents\Arduino\libraries\TCA9548A\src folder, and contains the .cpp and .h files. Not sure if the complier is finding it.
The AdafruitAHT10 liberary is also under the arduino libraries folder and contains both the .CPP and .h files with the same name.
Should the TCA9548A files be removed from the \src folder?
Thanks
Jim