SoapUI to send and receive large files

I try to send a SOAP request with attachment with use of SoapUI 5.7.0. In server log I see, that request was successfully received and response was sent. Response is also a large file and I get error message in SoapUI:

Error getting response; null

I set following in SoapUI:

File - Preferences - HTTP Settings: Socket timeout: 600000, Max response size: 0. Proxy setting: None In test request properties I set Timeout to 600000.