diff --git a/R/check_argument_validation.R b/R/check_argument_validation.R
new file mode 100644
index 0000000..6f1715e
--- /dev/null
+++ b/R/check_argument_validation.R
@@ -0,0 +1,107 @@
+#' Argument Flag check
+#'
+#' check to make sure arguments passed bby user do not contradict each other.
+#'
+#' @inheritParams get_comland_data
+#'
+#' @noRd
+
+# We can either create error messages (like below) or fix argument specs
+
+check_argument_validation <- function(aggArea,
+                                      userAreas,
+                                      areaDescription,
+                                      propDescription,
+                                      applyProp,
+                                      aggGear,
+                                      userGears,
+                                      fleetDescription,
+                                      unkVar,
+                                      knStrata) {
+
+  ############## AggArea ###############
+
+  # if aggArea = T then userAreas, areaDescription and propDescription
+  # follow rules
+  if(aggArea) {
+    # field names of userAreas
+    if(!(areaDescription %in% names(userAreas))) {
+      stop(paste0(areaDescription, " is not a field name in userAreas object"))
+    }
+    if(!(propDescription %in% names(userAreas))) {
+      stop(paste0(propDescription, " is not a field name in userAreas object"))
+    }
+    if(!("AREA" %in% names(userAreas))) {
+      stop(paste0("AREA is not a field name in userAreas object.
+      This object is used to aggregate Statistical Areas to larger regional units.
+      Field names must include: AREA and 'areaDescription' "))
+    }
+  }
+
+  ############## AggGear ###############
+
+  # if aggGear = T then userGears, fleetDescription follow rules
+  if(aggGear) {
+    # field names of userGears
+    if(!(fleetDescription %in% names(userGears))) {
+      stop(paste0(fleetDescription, " is not a field name in userGears object"))
+    }
+  }
+
+  ############## applyProp ###############
+
+  # applyProp currently relies on a specific format of userAreas
+  if(applyProp) {
+    if (!aggArea) {
+      stop("Can not have 'aggArea = F' if you want to propotion landings ('applyProp = T') by
+           statistical area to a larger spatial unit")
+    }
+
+    # if aggArea = T hen these conditions should be met
+    if(!("NESPP3" %in% names(userAreas))) {
+      stop(paste0("NESPP3 is not a field name in userAreas object.
+      This object is used to aggregate Statistical Areas to larger regional units and
+      proportion landings to these larger regional unit depening on the species and Statistical area.
+      Field names must include: NESPP3, AREA and 'areaDescription' "))
+    }
+
+    stop("Proportion allocation is currently not implemented correctly.
+         Please use 'applyProp = F'")
+
+  }
+
+  ################ UNKNOWNS #################
+
+  # checks for filling in missing values (assign_unknowns)
+  # Depending on the flags above will determine how the arguments unkVar and knStrata are defined
+  if (aggArea) {
+    if (!(areaDescription %in% unkVar) | !(areaDescription %in% knStrata)) {
+      stop(paste0("To assign unknowns when using 'aggArea = T', then you need to replace
+           'AREA' with '" ,areaDescription,"' in both 'unkVar' and 'knStrata' arguments"))
+    }
+  } else {
+    if (!("AREA" %in% unkVar) | !("AREA" %in% knStrata)) {
+      stop(paste0("To assign unknowns when using 'aggArea = F', then you need to use
+           'AREA' in both 'unkVar' and 'knStrata' arguments"))
+    }
+
+  }
+
+  if (aggGear) {
+    if (!(fleetDescription %in% unkVar) | !(fleetDescription %in% knStrata)) {
+      stop(paste0("To assign unknowns when using 'aggGear = T', then you need to replace
+                'NEGEAR' with '" ,fleetDescription,"' in both 'unkVar' and 'knStrata' arguments"))
+    }
+  } else {
+    if (!("NEGEAR" %in% unkVar) | !("NEGEAR" %in% knStrata)) {
+      stop(paste0("To assign unknowns when using 'aggGear = F', then you need to use
+           'NEGEAR' in both 'unkVar' and 'knStrata' arguments"))
+    }
+  }
+
+
+
+
+  # check for character or numeric
+
+}
diff --git a/R/get_comland_data.R b/R/get_comland_data.R
index 79e6fa5..d108408 100644
--- a/R/get_comland_data.R
+++ b/R/get_comland_data.R
@@ -51,14 +51,23 @@
 #'@export
 
 
-get_comland_data <- function(channel, filterByYear = NA,
-                             filterByArea = NA, useLanded = T, removeParts = T,
-                             useHerringMaine = T, useForeign = T, refYear = NA,
-                             refMonth = NA, disagSkatesHakes = T, aggArea = F,
+get_comland_data <- function(channel,
+                             filterByYear = NA,
+                             filterByArea = NA,
+                             useLanded = T,
+                             removeParts = T,
+                             useHerringMaine = T,
+                             useForeign = T,
+                             refYear = NA,
+                             refMonth = NA,
+                             disagSkatesHakes = T,
+                             aggArea = F,
                              userAreas = comlandr::mskeyAreas,
-                             areaDescription = 'EPU', propDescription = 'MeanProp',
+                             areaDescription = 'EPU',
+                             propDescription = 'MeanProp',
                              applyProp = F,
-                             aggGear = F, userGears = comlandr::mskeyGears,
+                             aggGear = F,
+                             userGears = comlandr::mskeyGears,
                              fleetDescription = 'Fleet',
                              unkVar = c('MONTH','NEGEAR','AREA'),
                              knStrata = c('HY', 'QY','MONTH','NEGEAR', 'TONCL2', 'AREA')) {
@@ -67,6 +76,20 @@ get_comland_data <- function(channel, filterByYear = NA,
 
   call <- dbutils::capture_function_call()
 
+
+  check_argument_validation(aggArea,
+                            userAreas,
+                            areaDescription,
+                            propDescription,
+                            applyProp,
+                            aggGear,
+                            userGears,
+                            fleetDescription,
+                            unkVar,
+                            knStrata
+                            )
+
+
   #Pull raw data
   comland <- comlandr::get_comland_raw_data(channel,
                                             filterByYear, filterByArea,
@@ -111,7 +134,6 @@ get_comland_data <- function(channel, filterByYear = NA,
                                                                       channel,
                                                             filterByYear, filterByArea)
 
-  saveRDS(comland,here::here("data_raw/data/64preagg.rds"))
   #Aggregate areas
   if(aggArea) comland <- aggregate_area(comland,
                                         userAreas,
@@ -121,9 +143,6 @@ get_comland_data <- function(channel, filterByYear = NA,
                                         channel,
                                         applyProp)
 
-  saveRDS(comland,here::here("data-raw/data/64postagg.rds"))
-
-
   #Aggregate gears
   if(aggGear) comland <- aggregate_gear(comland, userGears, fleetDescription)