Category:Unusual parameters of Infobox locomotive template

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This category is automatically populated by certain parameters being passed to {{Infobox locomotive}}. As of April 2011, these deprecated parameters are:

• 1 (sorted under "σ" i.e. "Σ") - the template takes no positional parameters, so determine if this is a parameter name lacking both equals sign and value, or a parameter value; and then either add the missing half of the parameter, or remove it entirely
• leadingsize (sorted under "L") - use |leadingdiameter=
• driversize (sorted under "D") - use |driverdiameter=
• trailingsize (sorted under "T") - use |trailingdiameter=
• weight (sorted under "W") - ambiguous; use one or more of |locoweight=, |tenderweight=, |locotenderweight=
• topspeed (sorted under "S") - use |maxspeed=
• railroad (sorted under "R") - use |operator=
• railroadclass (sorted under "C") - use |operatorclass=
• roadnumber (sorted under "#") - use |fleetnumbers=
• cylinders (sorted under "Y") - ambiguous; use one or more of |cylindercount=, |cylindersize=, |frontcylindersize=, |rearcylindersize=, |hpcylindersize=, |lpcylindersize=

The complete absence of certain parameters also triggers this category:

• name (sorted under "N")

In addition, this category is triggered for certain invalid values being passed in valid parameters:

• image (sorted under "I") when the relevant image file does not exist, or the file name is prefixed with File:, which is not required.