dcount

Hi,Siemens_Staines！

If your Wincc Version is V7,You should use something like @NOTP::TagName to avoid the Tag Prefix； IfWinCC Version is less then V7，I suggestthat Add the Tag "@DatasourceNameRT" value in the Dataset object when wincc start，so u can read theDatasetvalue in the picturewindow with tagprefix；

Regards

dcount

HI
Only the tag you should insert "@NOTP::" before it.

_{Dim DSN_Name
Set DSN_Name = HMIRuntime.Tags("@NOTP::@DatasourceNameRT")
DataSource = DSN_Name.Read}