Sorry to disturb again, but I figured the information I posted might not be specific enough. Here's the descriptive statistics of my dataset: Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- year | 1001 94 3.163858 89 99 cbi | 1001 .3845754 .2058889 0 .92 eu | 1001 .0989011 .2986784 0 1 cpi | 880 111.8884 199.0797 1.81e-06 3124.752 tr | 936 76.47002 48.74127 13.24375 396.6755 -------------+-------------------------------------------------------- po | 916 4.876638 6.250601 -10 10 wci | 938 3387.739 6367.461 0 77037 pf | 919 5674.383 2708.288 0 9706 re | 956 1.040795 .2408732 1 3 ca | 956 .5355649 .6289614 0 4 -------------+-------------------------------------------------------- el | 956 .25 .4356496 0 2 gd | 977 8950.406 11550.83 84.72279 52710.84 gc | 949 16.60749 5.595488 2.975538 43.47921 lo | 843 -20.08457 6.198199 -38.56496 -13.95405 li | 944 -17.66637 4.674441 -38.56496 -13.77711 -------------+-------------------------------------------------------- ig | 977 .0151439 .0355445 0 .3569717 cc | 732 .4038123 .1085877 .0947325 .7879977 mi | 670 .581803 1.112209 -3.78889 3.306389 id | 1001 106.1429 60.20539 2 207 I set Amts = 1 and Amcs=19 Here's the logfile ********************* Amelia Begins ********************* Inputs valid, beginning EMs... Iteration Number: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 Iterations Complete. Calculating variance/covariance matrix Imputation: C:\GAUSS\SRC\AMTSCS.SRC(195) : error G0046 : Columns don't match Currently active call: UNDOTSCS [195] I am at a loss trying to interpret the last statement. Thank you veru much for your help! Simone