>>>Here is some code derived from legacy code. The TIMEOUT clause does not cause a time out after the specified number of seconds. Is this a known bug?
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>>I'd lean toward it is not a bug per se, but incompatibility between legacy code (@ SAY/GET w/ READ CYCLE) and more current style of coding introduced with Visual FoxPro (OO-style form objects and READ EVENTS). Might be easier to simply redo the forms (often the underlying logic can be adapted -- in some cases it is simplified), than it would to try to apply various workarounds and have to deal with "quirky" behavior as a result..
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>VFP is downward compatible, isn't it?! It's either a bug or a quirck or by design. My best hunch is that it started to be a quirck with the introduction of faster computers than at the time it was implemented.

I wouldn't expect 100% backwards compatibility. UI-related commands would certainly be affected by how it is handled "natively" (so it's likely to be 'by design'). Commands like LOAD and CALL would be ones that I wouldn't expect to even be implemented (due to the low-level nature).