• Diaphragm Load Applied to a Story with no Diaphragm at: label.
• Combine the Mass and/or Set the Exposure to None and/or,
• Create Nodal Load Case(s) and Merge.

Solution:

This error is encountered in buildings with diaphragm-less story levels (such as levels where all the columns, braces and walls are disconnected from the diaphragm). Since there is no diaphragm at that level, RAM Frame cannot apply a story (diaphragm) force at that level. User-specified loads at such levels must be modified by inputting them as nodal loads or by adding them to another story level. Similarly, generated story forces need to be inputted as nodal loads, or lumped to the level above or below by specifying combining of mass (i.e., in Loads - Masses - for seismic generated loads) or setting the exposure to "None" (i.e., in Loads - Exposure - for wind loads).

• UBC Error in structure period. T is specified as zero.
• ASCE Error in structure period. T is specified as zero.

Solution:

Specify a non-zero structural period in the load dialog boxes in Loads - Load Cases.