In the process of checking a package, I get the warning
 
Foreign function calls without 'PACKAGE' argument:
.Call("tr", ...)
.Call("trProd", ...)
See section 'System and foreign language interfaces' of the 'Writing R..
 
These functions are called using the wrappers

trX <- function(x, package="gRcox") {  .Call("tr", x, package="gRcox") }
trXY <- function(x, y, package="gRcox") {  .Call("trProd", x, y, package="gRcox") }
 
I can't figure out what I am supposed to - and reading the specific section of "writing R extensions.." does not help me. 
 
Can anyone help?
Thanks 
Søren
 

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