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Help / WLanguage / Errors / WLanguage errors
  • Reason
  • Correction
  • Example
  • Extracting the first character of the string
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Error 531: The negative or null subscripts are not allowed
Reason
You are using the operators for string extraction ([[ or ]]). The extraction subscript for a WLanguage string always starts from 1: the subscript of the fist character is set to 1.
Correction
Modify the value specified for the extraction subscript.
Example

Extracting the first character of the string

Code triggering the error
sString is string = "WEBDEV is great"
Trace(sString[[0]])
Possible correction
Replace 0 by 1 (first character of the string).
sString is string = "WEBDEV is great"
Trace(sString[[1]])
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Last update: 07/03/2023

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