The property from which you are attempting to read a value did not specify a 'read' clause, thereby causing it to be a write-only property.
program Produce; type Base = class s : String; property Password : String write s; end; var c : Base; s : String; begin s := c.Password; end.
Since c.Password has not specified a read clause, it is not possible to read its value.
program Solve; type Base = class s : String; property Password : String read s write s; end; var c : Base; s : String; begin s := c.Password; end.
One easy solution to this problem, if you have source code, would be to add a read clause to the write-only property. But, adding a read clause is not always desirable and could lead to holes in a security system. Consider, for example, a write-only property called 'Password', as in this example: you certainly wouldn't want to casually allow programs using this class to read the stored password. If a property was created as write-only, there is probably a good reason for it and you should reexamine why you need to read this property.
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