For scripting to work without errors the connection names for an object should be unique.
Autoname connections generates such names in the form
prefixIn# or prefixOut# where # is an incrementing number and prefix is the prefix defined for the signal type.
When this button is click ControlDraw prompts "Preserve compliant names"
when selected the names are not changed if their first letters match the default for the connection type.
When Auto-renaming connections from the Symbol Dynamics Form ControlDraw attempts to rename the variables in the symbol script. This works provided by substituting the old connection names with the new ones in the entire script.