Another thought - is this client's local C:\ drive partitioned? If so, there is a possibility that when they installed Adagio they did not point to the correct drive for the report tables.
Normally, you should select the same drive for both the program 'destination directory' (e.g. x:\SOFTRAK\xxWIN) and the 'Report Tables Drive'. If your client's setup is different than this, then when they re-install Adagio, they should pay special attention to this. Do a 'Custom Install' rather than select the default 'Standard Install'. This will allow you to control this.
Especially if ACCPAC Plus is installed, the standard install defaults to the first drive found that contains ACCPAC Plus programs and installs to this drive - it may not always select the same drive for program installation as it does for the Report Tables installation - if this is the case, you could encounter problems such as what your client is experiencing, although this is more unlikely on a standalone PC.
Typically 'standalone' refers to a system that does not have the ability to connect to a Server/network, however, this does not rule out having the local C: drive partitioned.
Sorry for not thinking of this sooner. If this is not the case with your client, then my earlier responses should resolve the problem.
Regards