The OPAL Discussion Forum

["Calvo Portela, Pedro" <Pedro.Calvo AT ciemat.es>]

Hi Phillipe

Since OPAL2021.1 we use predefined constants to declare command attributes (see https://gitlab.psi.ch/OPAL/src/-/issues/654). Thus, we avoid misassignment of these variables, but now some string names are not available to be used as label of elements or beamlines. In your case, GS is a fieldsolver attribute (AMR_MG_SMOOTHER), so you cannot use it.

Best regards

Pedro

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De: opal-request AT lists.psi.ch <opal-request AT lists.psi.ch> en nombre de Philippe Piot <philippe.piot AT gmail.com>
Enviado: viernes, 19 de noviembre de 2021 0:46:40
Para: opal
Asunto: [Opal] opal-t "GS" w/ OPAL-2021.1

 

Dear All,

  Is there anything special to the "GS" string in OPAL-2021.1? I have a beamline call GS something as simple as 

GS:  Line = (GUN,DR1); 

 OPAL would not run and gives the error

Error{6}>
Error{6}> *** User error detected by function "OpalData::define()"
Error{6}>     You cannot replace the object "GS".
Error{6}>     You cannot replace the object "GS".

After fiddling around I decided to rename the beamline GS1 and everything worked fine! From the source, I could not figure out why "GS" is giving this error. 

  Thank you, -- Philippe. 

PS: and this works fine with OPAL-2.4