Wait for object to be displayed

The value is seconds, hence 30

Thanks, I corrected value, but still not working correctly. It doesn't wait for the end of period, new iteration is started.

 Not clear what you are doing
Paste more code

I click to another object before this and there is just one other command after that:
click("1548143854795.png")

text.each_line do |line|
 click()
 paste()
 click()
 wait(Pattern("1548143854795.png").similar(0.7),30000).
 click("1548143854795.png")
end

Where do you catch a possible FindFailed?

you said you changed this:
wait(Pattern("1548143854795.png").similar(0.7),30000).

????

Sorry, I changed it, but copied line from question. It doesn't wait for 35 seconds, gives FindFailed for object in click() method.

My guess:

Your code is:
wait(Pattern("1548143854795.png").similar(0.7),30000).
click("1548143854795.png")

The wait statement looks for an image with similarity of 70% (which probably exists), but the click statement requires 100% similarity (which probably is not there).

Suggestion: try with click() without parameters or click(getLastMatch()) or click(Pattern("1548143854795.png").similar(0.7))