Trying to close device "Manson HCS-3102 (/dev/ttyUSB1)

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Hi,
i use Linux Mint 22 and SmuView-0.0.6-git-a5ffb66-x86_64.AppImage with my Manson HCS-3102 .
Every time i change the voltage or the current i get these Messages: (but the values are set)

Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error

If i try to close the application i get:
BaseDevice::close(): Trying to close device "Manson HCS-3102 (/dev/ttyUSB1)"

The complete Terminal output:

onfigurable::init(): Init  "Manson HCS-3102"  - key  "Enabled"
Configurable::init(): Init  "Manson HCS-3102"  - key  "Current Limit"
Configurable::init(): Init  "Manson HCS-3102"  - key  "Current"
Configurable::init(): Init  "Manson HCS-3102"  - key  "Voltage Target"
Configurable::init(): Init  "Manson HCS-3102"  - key  "Voltage"
Init channel  "CH1" , channel_start_timestamp =  "2024.10.11 17:51:10.603"
Start aquisition for  "Manson HCS-3102" ,  aquisition_start_timestamp_ =  "2024.10.11 17:51:10.603"
Init analog base signal  "CH1 [V DC]"
Init analog time signal  "CH1 [V DC]" , signal_start_timestamp_ =  "2024.10.11 17:51:10.603"
HardwareChannel::push_sample_sr_analog():  "CH1"  - Signal was not found and was therefore created:  "CH1 [V DC]"
Init analog base signal  "CH1 [A]"
Init analog time signal  "CH1 [A]" , signal_start_timestamp_ =  "2024.10.11 17:51:10.603"
HardwareChannel::push_sample_sr_analog():  "CH1"  - Signal was not found and was therefore created:  "CH1 [A]"
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Voltage Target" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Current Limit" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Current Limit" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Current Limit" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Current Limit" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Current Limit" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Current Limit" .  generic/unspecified error
Configurable::set_config(): Failed to set config key  "Current Limit" .  generic/unspecified error
BaseDevice::close(): Trying to close device  "Manson HCS-3102 (/dev/ttyUSB1)"

After i while i get:

I have already installed udev.
Also i have tried it under root...

Whats wrong ?
Any ideas ?

best regards
Klaus