diff --git a/invivos/app.R b/invivos/app.R
index e16b675..b967cf8 100755
--- a/invivos/app.R
+++ b/invivos/app.R
@@ -493,12 +493,12 @@ server <- function(input, output) {
           scale_x_continuous(expand = expansion(mult = c(0,0.05)), limits = c(0, (round(max(table$DayPostInoc) / 5)+1)*5))+
           theme_bw()
       }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) == "+") %>% 
@@ -569,9 +569,9 @@ 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) == "+") %>% 
@@ -601,8 +601,9 @@ server <- function(input, output) {
       if (input$vacc == "Sí"){
         firstoper<- filter(table, !is.na(substr(Observations,1,1)) & substr(Observations,1,1) == "*") %>% 
           select(DayPostInoc, Side) %>% unique() %>% 
-          group_by(Side) %>% summarise(FirstOper=min(DayPostInoc))
-        if (input$operated == TRUE & nrow(firstoper) > 0){
+        if (firstoper == Inf){firstoper<-c()}
+        
+        if (input$operated == TRUE & length(firstoper) > 0){
           for (i in 1:nrow(firstoper)){
             table<-table %>% filter(DayPostInoc < firstoper$FirstOper[i] | Side != firstoper$Side[i])
           }