Meta
OS: Windows 10
Selenium IDE Version: 3.6.0
Selenium SIDE Runner Version: 3.6.0
Node version: npm: 6.7.0
Browser: Chrome
Expected Behavior
I have added in the suit two test cases. In the first one url is stored in 'host' variable and in the second test this url should be opend by 'open|${host}' command. When I run this suit in Selenium IDE, it works correctly. But when I run it through 'selenium-side-runner test.side' command, error appears.

Here I attempt my test.side file:
test.txt
Why is this wrong? How should I use stores variables?