diff --git a/invivos/app.R b/invivos/app.R
index 20e431e..d73bab3 100755
--- a/invivos/app.R
+++ b/invivos/app.R
@@ -645,9 +645,9 @@ server <- function(input, output) {
       }else{
         firstoper<- filter(table, !is.na(substr(Observations,1,1)) & substr(Observations,1,1) == "*") %>% 
           pull(DayPostInoc) %>% min(na.rm = T)
-        print(firstoper)
+        if (firstoper == Inf){firstoper<-c()}
         
-        if (input$operated == TRUE & nrow(firstoper) > 0){
+        if (input$operated == TRUE & length(firstoper) > 0){
           table<-table %>% filter(DayPostInoc < firstoper)
         }else{
           deadmice<-filter(table, !is.na(substr(Observations,1,1)) & substr(Observations,1,1) == "+") %>%