World: r3wp

17/12-2:59:31.9210-[HTTPd] Method: GET - resource: /show.cgi
17/12-2:59:36.0930-[uniserve] New client: 127.0.0.1 - 9799
17/12-2:59:36.0930-[uniserve] Calling >on-new-client<

17/12-2:59:36.0930-[uniserve] << Port: 1723, low-level writing: 896
17/12-2:59:36.1090-[uniserve] Calling >on-write-done<

17/12-2:59:36.1250-[uniserve] >> Port: 1723, low-level reading: 13

17/12-2:59:36.1250-[uniserve] Calling >on-received< with {^@^@^@^-}

17/12-2:59:36.1400-[uniserve] Calling >on-received< with "[ok none]"

17/12-2:59:36.1400-## Error in [uniserve] : On-received call failed 
with error: make object! [
    code: 303
    type: 'script
    id: 'expect-arg
    arg1: 'copy
    arg2: 'value
    arg3: [series! port! bitset!]
    near: [either "HTTP" = copy/part data]
    where: 'on-task-done
] !
17/12-2:59:36.1710-[uniserve] Port closed : 127.0.0.1
17/12-2:59:31.9210-[HTTPd] Method: GET - resource: /show.cgi
17/12-2:59:36.0930-[uniserve] New client: 127.0.0.1 - 9799
17/12-2:59:36.0930-[uniserve] Calling >on-new-client<

17/12-2:59:36.0930-[uniserve] << Port: 1723, low-level writing: 896
17/12-2:59:36.1090-[uniserve] Calling >on-write-done<

17/12-2:59:36.1250-[uniserve] >> Port: 1723, low-level reading: 13

17/12-2:59:36.1250-[uniserve] Calling >on-received< with {^@^@^@^-}

17/12-2:59:36.1400-[uniserve] Calling >on-received< with "[ok none]"

17/12-2:59:36.1400-## Error in [uniserve] : On-received call failed 
with error: make object! [
    code: 303
    type: 'script
    id: 'expect-arg
    arg1: 'copy
    arg2: 'value
    arg3: [series! port! bitset!]
    near: [either "HTTP" = copy/part data]
    where: 'on-task-done
] !
17/12-2:59:36.1710-[uniserve] Port closed : 127.0.0.1

data
 is somehow none.
The error happens in on-task-done event function:


 on-task-done: func [data /local valid out value ctype body headers 
 s e][
		either "HTTP" = copy/part data 4 [  ;<<<<<<<<<<
			;--- Non Parsed Header output ---
			write-client data
		][
			;--- Parsed Header output ---
			out: ctype: line: none

Problem solved. Thanks Doc.