Open command badly parsed

open ftp:/tomas:tomas12/34@1.2.3.4

. 2020-09-15 14:05:29.047 Script: Retrospectively logging previous script records:
> 2020-09-15 14:05:29.047 Script: option batch abort
> 2020-09-15 14:05:29.047 Script: Parameter: batch
> 2020-09-15 14:05:29.047 Script: Parameter: abort
< 2020-09-15 14:05:29.047 Script: batch abort
> 2020-09-15 14:05:29.047 Script: option confirm off
> 2020-09-15 14:05:29.047 Script: Parameter: confirm
> 2020-09-15 14:05:29.047 Script: Parameter: off
< 2020-09-15 14:05:29.047 Script: confirm off
> 2020-09-15 14:05:29.047 Script: open ftp:/tomas:tomas12/34@1.2.3.4
> 2020-09-15 14:05:29.047 Script: Parameter: ftp:/tomas:tomas12/34@1.2.3.4
. 2020-09-15 14:05:29.047 --------------------------------------------------------------------------
. 2020-09-15 14:05:29.047 Session name: tomas (Ad-Hoc site)
. 2020-09-15 14:05:29.047 Host name: tomas (Port: -1)
. 2020-09-15 14:05:29.047 User name: (Password: No, Key file: No, Passphrase: No)
. 2020-09-15 14:05:29.047 Transfer Protocol: FTP
. 2020-09-15 14:05:29.047 Ping type: Dummy, Ping interval: 30 sec; Timeout: 15 sec
. 2020-09-15 14:05:29.047 Disable Nagle: No
. 2020-09-15 14:05:29.047 Proxy: None
. 2020-09-15 14:05:29.047 Send buffer: 262144
. 2020-09-15 14:05:29.047 UTF: Auto
. 2020-09-15 14:05:29.047 FTPS: None [Client certificate: No]
. 2020-09-15 14:05:29.047 FTP: Passive: Yes [Force IP: Auto]; MLSD: Auto [List all: Auto]; HOST: Auto
. 2020-09-15 14:05:29.047 Local directory: default, Remote directory: /34@1.2.3.4, Update: Yes, Cache: Yes
. 2020-09-15 14:05:29.047 Cache directory changes: Yes, Permanent: Yes
. 2020-09-15 14:05:29.047 Recycle bin: Delete to: No, Overwritten to: No, Bin path:
. 2020-09-15 14:05:29.047 Timezone offset: 0h 0m
. 2020-09-15 14:05:29.047 --------------------------------------------------------------------------
. 2020-09-15 14:05:29.048 Username prompt (no username provided)