Resolve the properties and exit the programme

I use the code like below , when the programe resolve the properties file , printf the message and exit .  I don't want to the program exit , just throw a error to me , I can catch is err and continue reslove the other file .
use code 
`file_content:=properties.MustLoadFile(path+"/"+name,properties.UTF8)
	keys := file_content.Keys();
`
message 
`2019/10/15 15:37:09 malformed expression
`