All error conditions
 521   can't open cache file [chkcache]
  74   http error
2947   no match for selector
  30   search string is empty!
  37   search term regular expression error
   1   selector syntax error
3432   sorry, access denied or file does not exist.
   1   syntax error [arg] in selector
   8   syntax error [no '/'] in selector [pselect]
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