When using Tango V5 but without modifying device code
(device still inheriting from Device_2Impl), the
attribute last written
value is not returned when the attribute is read
(for READ_WRITE attribute). Instead, 0 is always returned.
Will be fixed in Tango 5.1
Workaround: Modify your device code to inherit from
Device_3Impl (using Pogo)
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Fixed in Tango 5.1