[amelia] tscsPlot error: Unsupported use of matrix or array for column indexing

Hello, I am new to amelia and have been unable to find any info on the error I am receiving: *> tscsPlot(bd.am.poly1, cs = "Fraud", var = "n")* *Error: Unsupported use of matrix or array for column indexing* The data is 3 variables: a date var used for the ts, a grouping var used for cs, and a count var, "n", which is my outcome variable that requries imputation. My initial amelia call looks like this (note that it wasn't clear if amelia supported datetime objects, so I converted to seconds since epoch - if it can handle datetime objects and this conversion is unnecessary, it would be great to know that!): *>bd.am.poly1 <- amelia(bdsum, idvars = "date", ts = "datenum", cs = "call.type", polytime = 1, intercs = T)* Here's a sample of the data: date call.type n datenum <date> <fctr> <dbl> <dbl> 1 2016-08-17 Criminal Mis C NA 17030 2 2014-02-10 TRAFFB-Traffic Complaint NA 16111 3 2015-11-03 WEAPO1B-Weapon I/P 1 16742 4 2016-09-03 Disturbance 0 17047 5 2015-02-24 Assault 0 16490 6 2014-08-06 Unknown Problem 0 16288 7 2014-08-28 INJACC3B-Injury Accident C 0 16310 8 2015-06-11 Recovered Stolen Prop 0 16597 9 2016-02-15 Lost Property 0 16846 10 2015-05-09 Welfare Check 2 16564 Thanks much, Jon --- Jonathan Zadra, PhD Data Scientist Sorenson Impact Center David Eccles School of Business, University of Utah www.sorensonimpactcenter.com --