String as Input/Output Parameter in RFCs

[Former Member]

Dear experts,

I trying to pass XML-Strings to a SAP System using RFC-Components.

I found in a SAP-Press-Book that it´s not possible to use the ABAP data type "String" as import and export parameter since the length has to be determined when programming the FM.

On the other hand I saw RFC-FM with String als parameter.

Is this a version issue? Anyone some information on this topic.

Thanx

Oliver

[Former Member]

Hi Rainer,

thx for your response.

The idea that Strings are not allowed as parameters was my idea aswell. But SAP uses it in FM "RSR_NET_INTERFACE" (i.e.)...

So there must be a way...

Thx

[rainer_hbenthal]

As far as i know strings are not allowed in RFC FM because its a deep structure. Never saw this running in any versio, but of course i didnt tried that everywhere.

A table of char1024 might be useful for this, splitting the string into 1024 byte portions.

[Former Member]

Hi Rainer,

thx for your response.

The idea that Strings are not allowed as parameters was my idea aswell. But SAP uses it in FM "RSR_NET_INTERFACE" (i.e.)...

So there must be a way...

Thx

[rainer_hbenthal]

Then give Pass Value option a try.

[Former Member]

Hi Rainer,

I did.. doesn't work... strange...

[uwe_schieferstein]

Hello Oliver

I am not sure where the problems lies but I can create and call the following RFC-fm (rfcdest = 'NONE') without any problems (on our 4.6c):

FUNCTION z_us_rfc_with_string.
*"----------------------------------------------------------------------
*"*"Lokale Schnittstelle:
*"  IMPORTING
*"     VALUE(ID_INPUT) TYPE  STRING
*"  EXPORTING
*"     VALUE(ED_OUTPUT) TYPE  STRING
*"----------------------------------------------------------------------


  ed_output = id_input.


ENDFUNCTION.

Regards

Uwe

[Former Member]

Hi Uwe,

thx for your input.

I believe the problem lies in the RFC SDK used - doing the RFC-Call.

I found that in the current version NW RFC SDK Strings are allowed as data type...diffrent to the "classic" one...

Thanx to every body for your help!

Regards Oliver