When a field contains the container!<field> accessor, the system checks whether the artifact actually has a container, for example, a block having a containing group. If the container is missing, the system returns an error, stating the noncontained block and its name by filling the blanks for <Artifact type> and <Artifact name>, respectively.

When a field contains the sheet!<field> accessor, the system checks to see if it can access the sheet that contains the shape. If the shape is not on a sheet, the ID is zero (there is no valid sheet with an ID of zero). If the shape specifies a sheet that does not exist or has an ID of zero, the error message indicates the ID of the offending sheet.

When a field contains the design!<field> accessor, the system attempts to access the design associated with the object label. If the object label is not associated with a design, the system returns this error.

The system made an attempt to use an unrecognized accessor in a field (an accessor is the string before the !). The standard accessors are container, sheet, and design, but there is no restriction on including other accessors in the label class.

An artifact (a block, fiber, group, sheet, or a design) does not possess the parameter <parameter name>. This may happen as a result of deleting parameters of an object or any of its containers.