In a dashboard, I have a dropdown input where the user can enter an IP address (customs value). I want to validate that the user's input is really an IP address/net and if not change it to 0.0.0.0/0. I have the following XML in the dropdown input: 
  <change>
    <eval token="net_token">if(match($value|s$,"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"),"OK","KO")</eval>
    <set token="net_token_exp">if(match($value|s$,"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"),"OK","KO")</set>
</change>
  
 For example, I add the user custom value "aaaa" to the dropdown. Then, if I print the value of  net_token_exp  it shows:  
  if(match("aaaa","\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"),"OK","KO")   
 But maybe the  net_token  value is OK (even if it does not match the regex...) or it even not evaluates the condition so it does not change the net_token value. 
 What am I doing wrong?  
						
					
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