Object reference error in verify expression activity

Getting error in verify expression activity. Attaching error screenshot. Kindly help resolving it. I am creating invoice using SAP. After successful creation of invoice I have added verify activity to check whether the document no. is created or not and the same is mentioned in the verify activities but getting object reference error.

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Hi @Deepali_Sawant,
Welcome to the Community!
I’m not sure if I will help you here but I thinkg this activity requires expression which will return either true or false. So maybe something like “StatusMessageInvoice.Contains(“created”) = true” or something similar will work?