Upload failed.: OSError: [Errno 22] EINVAL with LoPy4 and PyMakr

[christian_kohler]

I have a LoPy4 (version 1.18), plugged into an Expansion Board 2, and connected via USB to a Mac running Atom 1.27.2, and PyMakr 1.3.3

I can upload some small projects without a problem, but one project is failing consistently, see below.

>>>
Uploading project (main folder)...
Safe booting device... (see settings for more info)

Reading file status
Creating dir lib
[1/3] Writing file lib/sht31.py
[2/3] Writing file lib/urequests.py
[3/3] Writing file main.py
Upload failed.: OSError: [Errno 22] EINVAL
 Please reboot your device manually.
OKTraceback (most recent call last):
  File "<stdin>", line 2, in <module>
OSError: [Errno 22] EINVAL
>OKTraceback (most recent call last):
  File "<stdin>", line 2, in <module>
OSError: [Errno 22] EINVAL
>OKTraceback (most recent call last):
  File "<stdin>", line 2, in <module>
OSError: [Errno 22] EINVAL
>OK>OKets Jun  8 2016 00:22:57

rst:0x7 (TG0WDT_SYS_RESET),boot:0x12 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1728
load:0x4009fa00,len:0
load:0x4009fa00,len:14584
entry 0x400a059c

I did manage to upload it over FTP once, but that has not been a reliable route. Often when I connect to the LoPy AP and use FileZilla to connect to 192.168.4.1 I cannot get it to work.

Status:      	Connecting to 192.168.4.1:21...
Error:        	Connection timed out after 20 seconds of inactivity
Error:        	Could not connect to server

Any idea what is going on here?

Thanks

Christian

[robert-hh]

@christian_kohler Did you set Filezilla to single link/passive mode? The number of simultaneous links have to be set in the server settings submenu->transfer settings for each connection.
I'm using ftp all the time, and it is pretty reliable and fast. SInce I have Firfox open all the time anyhow, I prefer the FireFTP plugin.