Real data tables often contain the spaces: the value of some property xj may be absent for some object ai. As a result, the table with one or more empty cells will be forwarded to data analysis programs. The majority of known data analysis methods are not appropriate for treatment of «incomplete» tables, therefore the attempts were made to solve the problem of filling of gaps in the tables. One can find the review of such investigations in [1,2]. Algorithms [3] may differ from each other by basic heuristic suggestions (hypotheses).      This software contains algorithms of two families – ZET and WANGA. For error detection one cam use algorithm ZER-R.  REFERENCES 1. Afifi A.A., Elashov R.M. Missing observation in multivariation statistics // J. Amer. Stat. Assoc.-1966. Vol.61.  2. Aivazian S.A., Eniukov I.S., Meshalkin L.D. Applied statistics: the modelling basis and initial data treatment. Published by «Finances and Statistics», Moscow, 1993, (in Russian).  3. Zagoruiko N.G., Elkina V.N., Lbov G.S., Emelianov S.V. OTEKS applied software. Published by «Finances and Statistics», Moscow, 1986, (in Russian).