Try
Purchheader.GET(“Document Type”::Order,“No.”);
Codeunit.RUN(…)
REPORT.SAVEASPDF(REPORT::Order,‘C:\poimage.pdf’,Purchheader);
If it Didnt work try like
Purchheader.GET(“Document Type”::Order,“No.”);
REPORT.SAVEASPDF(REPORT::Order,‘C:\poimage.pdf’,Purchheader);
Codeunit.RUN(…)