B4R Question Using e.g. SPIFFS inside a Sub which is called from inline C only crashes

[KMatle]

SPIFFS is defined in Process Globals

If I call a Sub (like a callback sub when a new message arrives) from Inline C only (which isn't used in B4R anywhere -> I get a warning that it isn't used) and use SPIFFS or Wifi here I get a hard crash (fs.openreadwrite).

Calling the sub (copied the code to another sub) works fine (nothing special here).

Note: Code is reduced to this now

Sub NewBLEMessage 'called from inline C
  
        fs.OpenReadWrite(SSIDFileName)
        fs.Stream.WriteBytes(WiFiSSID,0,WiFiSSID.Length)
        fs.Close
           
        fs.OpenReadWrite(SSIDPWFileName)
        fs.Stream.WriteBytes(WiFiSSIDPW,0,WiFiSSIDPW.Length)
        fs.Close
       
End Sub

b4r_main::_newblemessage();

void StartBLEServer (B4R::Object* o) {

#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"


class MyCallbacks: public BLECharacteristicCallbacks {
    void onWrite(BLECharacteristic *pCharacteristic) {
      std::string value = pCharacteristic->getValue();
      memcpy((char*)b4r_main::_blemessage->data, value.c_str(), value.length());
      b4r_main::_blemessage_length = value.length();
      if (value.length() > 0) {
        Serial.println("*********");
        Serial.print("New value: ");
        for (int i = 0; i < value.length(); i++)
          Serial.print(value[i]);

        Serial.println();
        Serial.println("*********");
       
         b4r_main::_newblemessage();
       
       
      }
    }
};

  char *bn = (char*)b4r_main::_blename->data;
  BLEDevice::init(bn);
  BLEServer *pServer = BLEDevice::createServer();

  BLEService *pService = pServer->createService(SERVICE_UUID);

  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
                                         CHARACTERISTIC_UUID,
                                       //  BLECharacteristic::PROPERTY_READ |
                                         BLECharacteristic::PROPERTY_WRITE
                                       );

  pCharacteristic->setCallbacks(new MyCallbacks());

  pCharacteristic->setValue("Hello World");
  pService->start();

  BLEAdvertising *pAdvertising = pServer->getAdvertising();
  pAdvertising->start();

 
}
#End If