Error message to customer when Add To Cart Properly prevents adding item to cart

[mc12345678]

In a default install, if a customer tries to buy something with an attribute set to "required" but they've not made a valid selection, an error message is displayed to explain exactly what went wrong.
Further, when attempting to add an item to the cart that exceeds the available quantity an error message stating such is also displayed.

Perhaps your template and/or your alterations to the code are preventing the normal built-in functionality from operating as intended.

Thank you for identifying what is expected to be normal. I will investigate with that in mind. I am aware that the current template is not specifically designed for ZC1.5.x and have a plan to change to one that is. After I do that I will investigate the differences in code, although in my recent update to 1.5.1 (from 1.5.0) I don't recall finding any extra files (other than template related) and I understood what each change in the changed files did and why it was there. At the same time, it is possible that I do/did have extra conflicting files because I don't think I had displayed on screen files in my old path that were not in the new path. So worth investigating that as well. I know better than to operate that way, but was more interested in incorporating the new code than validating that the code was pure. Site works, but is disabled slightly by my own doing regardless.

Again thanks.

[mc12345678]

Thank you for identifying what is expected to be normal. I will investigate with that in mind. I am aware that the current template is not specifically designed for ZC1.5.x and have a plan to change to one that is. After I do that I will investigate the differences in code, although in my recent update to 1.5.1 (from 1.5.0) I don't recall finding any extra files (other than template related) and I understood what each change in the changed files did and why it was there. At the same time, it is possible that I do/did have extra conflicting files because I don't think I had displayed on screen files in my old path that were not in the new path. So worth investigating that as well. I know better than to operate that way, but was more interested in incorporating the new code than validating that the code was pure. Site works, but is disabled slightly by my own doing regardless.

Again thanks.

FYI, just did another quick look and it appears that the current template for my site responds as expected; however, the template (and associated overrides) that I had in place previously was likely the problem. I hadn't thought to ask the question until now, but I'm glad that it does work as expected.