Applies To
	Product(s):	STAAD.Pro
	Version(s):	All
	Environment:	N/A
	Area:	Modeling Solutions
	Subarea:	Loading
	Original Author:	Bentley Technical Support Group

Attached is a portion of my STAAD output file which contains an error messsage as shown:

30. LOAD 1 (1.4DL + 1.7LL)
31. SELF Y -1.4
32. MEMB LOAD
33. 11 TO 16 UNI Y -2.8
34. 11 TO 16 UNI Y -5.1
35. START CONCRETE DESIGN

**WARNING - UNEXPECTED COMMAND IN LOAD DATA
CHECK SPELLING AND ORDER OF DATA IN CASE NO. 1
COMMAND= START CONCRETE DESIGN
CHECK RESULTS CAREFULLY, LOADS MAY HAVE BEEN LOST
***STAAD.Pro WARNING***
ANALYSIS NOT PERFORMED - SO ABOVE COMMAND CAN NOT BE PROCESSED.
*********** END OF THE STAAD.Pro RUN ***********

Can you explain what it means?

You are following up your load instructions with a concrete design statement. (Notice that after 11 TO 16 UNI Y -5.1, you are specifying START CONCRETE DESIGN). There is no instruction for performing the analysis. A concrete design cannot be done until after the analysis has been performed. So, you need to specify the command PERFORM ANALYSIS in between those 2 lines, as in,

11 TO 16 UNI Y -5.1

PERFORM ANALYSIS PRINT STATICS CHECK

START CONCRETE DESIGN