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Invalid operation.
Source position: sysutilh.inc line 151
| type EInvalidOp = class(EMathError) ; | 
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 | Invalid operation. | |
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 | Mathematical error | |
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 | External Exception. | |
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 | Base class of all exceptions. | |
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 | Base class of all classes. | 
EInvalidOp is raised when an invalid operation is encountered.