Could not cast from Text to AB_location

Question

local!vehicleBaseLocations: append(local!vehicle,"ALL"), 
 
 I have written a rule and called that in local!vehicle(i am fetching data from DB). Am calling that in local!vehicleBaseLocations,I need to add ALL option also, I have used append to achieve it but its throwing error " Could not cast from Text to AB_location. Details: CastInvalidCould not cast from Text to AB_location. Details: CastInvalid 
 
 Can someone help what exactly am missing

Chris · Answer

Your use of append() will need to be adjusted here - what you are attempting to do above is append the text "ALL" into your AB_location CDT which has a different type, generating the mismatch error. You will want to append a line of type AB_location which includes the "ALL" value, such as: 
 a!localVariables(
 local!vehicle: 'type!{urn:com:appian:types}chris_test_cdt'(
 id: 1,
 data: "item1"
 ),
 
 append(
 local!vehicle,
 'type!{urn:com:appian:types}chris_test_cdt'(
 id: null,
 data: "ALL"
 )
 )
)

Could not cast from Text to AB_location

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