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This is an enquiry not so much about what the code for loadNamespace does, but rather about the intent and design of loadNamespace, and how it interacts with the `::` function, which seems to me to follow a slightly different philosophy...

Hi Duncan and others, For the record I think I have pinned down what happens wrt checking the version of an imported package. In summary : loadNamespace behaves as it ought to (once the discrepancy between the documentation and reality of...

Hi I'm still exploring the R programming universe, so if this is being asked in the wrong place, or in the wrong way (e.g. too verbose or lacking in crucial detail or in the wrong format) please let...

Hi Duncan, Many thanks (yet again). With the hint given by your earlier email (viz that currently loadNamespace expects a 3rd component called name in the list that is used for the versionCheck argument) I had another look at what...

Hi I am seeking to understand why the methods package (to be specific `methods:::.findOrCopyClass` when called by `setIs` when called by `setClass`) emits a warning message such as ` class "SpatialLinesNULL" is defined (with package slot 'rgeos') but no metadata...

Ah, I've got it now. >From `?base:bindenv` comes > " The namespace environments of packages with namespaces are locked when loaded." A locked environment > " prevents adding or removing variable bindings from the environment. Changing the value of a variable is...

Many thanks Duncan for the quick response. A bug is a relief in a way. I've been digging my way deeper into this (and learning more as I go) for several days now - but it is a diversion from...

Hi Duncan The difference is that in your call to loadNamespace, the versionCheck list has 3 components (name, op and version), whereas the documentation only mentions 2 (op and version). loadNamespace 'works' for me provided I add a third component...

Very many thanks indeed John for taking the time to look into this so closely and respond to me twice. I am hovering on the edge of understanding what was / is confusing me, and will read both your replies very...