The name in a parameter entity reference must be one of those declared in the DTD. The name in the reference has not been declared, but is close in its spelling to a declared entity's name. That entity has been used.

#0116   Markup Error

ISO 8879, 9.4.4.1

The name in a parameter entity reference must be one of those declared in the DTD. The name in the reference has not been declared, but is close in its spelling to a declared entity's name. That entity has been used.