can Arduino IDE point to a file in another directory? If yes how? With my code

../../main.h

the compile fails.

Error:

In file included from D:\Eigene Dateien\Entwicklung\SIGNALDuino_MR\src\arduino-ide\SIGNALDuino\SIGNALDuino.ino:1:0:

main.h:1:1: error: expected unqualified-id before '.' token

 ../../main.h

 ^

exit status 1
expected unqualified-id before '.' token

can Arduino IDE point to a file in another directory? If yes how? With my code

../../main.h

the compile fails.

Error:

In file included from D:\Eigene Dateien\Entwicklung\SIGNALDuino_MR\src\arduino-ide\SIGNALDuino\SIGNALDuino.ino:1:0:

main.h:1:1: error: expected unqualified-id before '.' token

 ../../main.h

 ^

exit status 1
expected unqualified-id before '.' token

--------------- structure ------------------

TEST
  |--main.h
  |-----Ordner 1
             |-----Ordner 3
                       |--files.h
  |-----Ordner 2
             |-----Ordner 4