Hi,

I'm using VM with Arduino IDE portable (1.8.9) to compile a project (.INO) for ESP8266 (-01).
Compiler returns an error :

Error            84:27: error: 'IPAddress' has not been declared 

but in Arduino IDE everything works fine.
At that line (84) there is no referring to IPaddress variable.

Attached you have VM and Arduino verbose compile output.

Any suggestions ?

Many thanks

Sure.

For complete information :

the error is on line 84 
84 #define ESPasSTA 0

but the first use of IPaddress is on line 552
IPAddress wip;

Many thanks

I found the reason of that error.
This project is splitted in many files with names starting as '01_aaa' '02_bbb' '03_ccc' and the last one is HautESP.ino .
When the compiler create the monolitic file .cpp (named HautESP.cpp) all the functions defined in these files are written before the #include of the libraries.
One of these functions, has IPaddress in declaration.
IPaddress is defined in IPaddress.h which is defined after that function, and so we have the error.
The workaround could be create a single .INO file including all separates .INO files and define the #include before all.
Any other suggestions are welcome, otherwise I will create a single file.