Always the same with any project. I created a project with one form, still the same. manually fine, programatically no good. I am going to try Dragan's suggestion of another vfp instance and see what happens.

>And with plain BUILD EXE, are there any other errors reported?
>
>Anyway, I think that it is an indication that either there is a line of code in particular module that errors out, or the project pjx file is corrupted.
>What if you build a new project from scratch (either manually or using BUILD PROJECT command or both)?
>As a last resource you can scan pjx and recompile prg and forms one by one.
>
>
>>It still fails the same way without setting any options, and BUILD EXE fails the same way also.
>>
>>
>>>Are you sure that it is nothing to do with aproject properies that you are setting before calling aproject.build ?
>>>What if you omit all of them and call build after aproject = _vfp.Projects[1] line?
>>>What if instead of _vfp.Projects you use plain build exe command?
>>>
>>>
>>>>No. the point is that everything works fine manually but fails programatically.
>>>>
>>>>
>>>>>>Function argument, value, or type is invalid
>>>>>>
>>>>>>>>project that works fine to build interactively fails using BUILD EXE or the prject.build method. I cannot find this anywhere, but I am wondering if "errors" like array not found could be the cause,.
>>>>>>>>
>>>>>>>>It does not seem likely or logical, as the user presses ignore all, and the errors are hamless. but I cannot figure out the issue. The build attempt returns .f. and creatss a small stub .exe. Here is typical code, in which to all apperances it works -- there is no discernable difference in the time or processing apperance between the interactive build and the programmatic build.
>>>>>>>>
>>>>>>>>MODIFY PROJECT foo1 nowait
>>>>>>>> aproject = _vfp.Projects[1]
>>>>>>>> aproject.versionnumber = blah
>>>>>>>> aproject.versioncompany = blah
>>>>>>>> aproject.versionproduct = blah
>>>>>>>> aproject.versioncopyright = blah
>>>>>>>>
>>>>>>>> y = JUSTSTEM(aproject.name) + ".exe"
>>>>>>>> z = aproject.build(y, 3 , .f. , .f.) && filename, type, rebuildall, showerrors
>>>>>>>> aproject.close:
>>>>>>>
>>>>>>>
>>>>>>>If you use aerror(), is there any error reported?
>>>>>
>>>>>Then try to open the project and rebuild it manually and with "recompile all files" option. Will you get the same error?