How can one module be different modules? Bug?

[davisr]

With the following source code (condensed from the actual)

Module

NewMaterialBurnupStepM
Implicit none
Contains
Function NewMaterialBurnupStep (ThisMaterial) result (This)
Use WIMSBURFCaseM
Type (MaterialType), intent (In), target:: ThisMaterial
Type (MaterialBurnupStepType):: This
This % Material => ThisMaterial
This % ReactionFissionPerLengthTime = ReactionFission_per_CmSec (0.0)
End function NewMaterialBurnupStep
End module NewMaterialBurnupStepM

I get the error message

Error: The same named entity from different modules and/or program units cannot be referenced. [REACTIONFISSION_PER_CMSEC]

How can I be referring to it from different modules when I onlyUse one module? What's more to the point, how can I correct this program, so that I can earn a living?

[Steven_L_Intel1]

If WIMSBURFCaseM USEd two other modules, both of which define ReactionFission_per_CmSec, you'd see this error. The duplicate definitions are not an error until you reference the name.

[davisr]

Thank you for your help.

That was not the problem. However, after another problem, and an inability to reproduce the problem in a smaller program, I discovered that under Properties ? Configuration Properties ? Fortran ? Preprocessor ? Additional Include Directories, where a list of several long directory names is crammed into a tiny space, there was a reference to a directory full of .mod files prepared by CVF. Correcting that sure corrected a lot of problems. I am going around all my other problem postings on this site to ensure that noboby wastes any (more) time on this problem.

[Steven_L_Intel1]

I'd be astonished if changing the include paths made a difference for this issue, since the Intel compiler cannot read CVF .mod files.