diff --git a/General-Blockchain-Age-of-Spent-Outputs/create-dataset-for-analysis.R b/General-Blockchain-Age-of-Spent-Outputs/create-dataset-for-analysis.R
index c56eb39..c9c3edf 100644
--- a/General-Blockchain-Age-of-Spent-Outputs/create-dataset-for-analysis.R
+++ b/General-Blockchain-Age-of-Spent-Outputs/create-dataset-for-analysis.R
@@ -5,30 +5,99 @@ library(DBI)
 # NOTE: Also need lubridate package installed, but not loading it due to 
 # it masking functions
 
+is.btc <- FALSE
+# Change to TRUE if processing BTC
+
 data.dir <- ""
 # Input data directory here, with trailing "/"
 
 
 con <- DBI::dbConnect(RSQLite::SQLite(), paste0(data.dir, "tx-graph-node-indices.db"))
 
-master.edgelist <- DBI::dbGetQuery(con, 
-  "SELECT origin_index, destination_index,block_height,value FROM edgelist_intermediate_2")
 
-master.edgelist.output.created <- master.edgelist[
-  (! is.na(master.edgelist$value)) & master.edgelist$value > 0 , c("destination_index", "block_height")]
-colnames(master.edgelist.output.created) <- c("output_index", "output.created.block_height")
-setDT(master.edgelist.output.created)
-
-master.edgelist.output.spent <- master.edgelist[, c("origin_index", "block_height")]
-colnames(master.edgelist.output.spent) <- c("output_index", "output.spent.block_height")
-setDT(master.edgelist.output.spent)
-
-# Only include positive _value_s for output created, since that's the value of the created output
-# Then, below do an "inner merge" to get the proper outputs on the spending side
-
-rm(master.edgelist)
-master.edgelist.output.spent <- merge(master.edgelist.output.created, master.edgelist.output.spent)
-rm(master.edgelist.output.created)
+if ( ! is.btc) {
+  
+  master.edgelist.output.created <- master.edgelist[
+    (! is.na(master.edgelist$value)) & master.edgelist$value > 0 , c("destination_index", "block_height")]
+  colnames(master.edgelist.output.created) <- c("output_index", "output.created.block_height")
+  setDT(master.edgelist.output.created)
+  
+  master.edgelist.output.spent <- master.edgelist[, c("origin_index", "block_height")]
+  colnames(master.edgelist.output.spent) <- c("output_index", "output.spent.block_height")
+  setDT(master.edgelist.output.spent)
+  
+  # Only include positive _value_s for output created, since that's the value of the created output
+  # Then, below do an "inner merge" to get the proper outputs on the spending side
+  
+  rm(master.edgelist)
+  master.edgelist.output.spent <- merge(master.edgelist.output.created, master.edgelist.output.spent)
+  rm(master.edgelist.output.created)
+  
+} else {
+  
+  # Split data requests and processing if BTC to avoid integer overflow issue in this step of processing.
+  # data.table issue:
+  # https://github.com/Rdatatable/data.table/issues/3957
+  # SQLite issue: "negative length vectors are not allowed"
+  
+  master.edgelist.lt.500k <- DBI::dbGetQuery(con, 
+    "SELECT origin_index, destination_index,block_height,value FROM edgelist_intermediate_2 WHERE block_height < 500000")
+  
+  master.edgelist.output.created.lt.500k <- master.edgelist.lt.500k[
+    (! is.na(master.edgelist.lt.500k$value)) & master.edgelist.lt.500k$value > 0 , c("destination_index", "block_height")]
+  colnames(master.edgelist.output.created.lt.500k) <- c("output_index", "output.created.block_height")
+  setDT(master.edgelist.output.created.lt.500k)
+  
+  master.edgelist.output.spent.lt.500k <- master.edgelist.lt.500k[, c("origin_index", "block_height")]
+  colnames(master.edgelist.output.spent.lt.500k) <- c("output_index", "output.spent.block_height")
+  setDT(master.edgelist.output.spent.lt.500k)
+  
+  rm(master.edgelist.lt.500k)
+  
+  
+  master.edgelist.gt.500k.lt.700k <- DBI::dbGetQuery(con, 
+    "SELECT origin_index, destination_index,block_height,value FROM edgelist_intermediate_2 WHERE block_height > 499999 AND block_height < 700000")
+  
+  master.edgelist.output.created.gt.500k.lt.700k <- master.edgelist.gt.500k.lt.700k[
+    (! is.na(master.edgelist.gt.500k.lt.700k$value) & master.edgelist.gt.500k.lt.700k$value > 0 ) , c("destination_index", "block_height")]
+  colnames(master.edgelist.output.created.gt.500k.lt.700k) <- c("output_index", "output.created.block_height")
+  setDT(master.edgelist.output.created.gt.500k.lt.700k)
+  
+  master.edgelist.output.spent.gt.500k.lt.700k <- master.edgelist.gt.500k.lt.700k[, c("origin_index", "block_height")]
+  colnames(master.edgelist.output.spent.gt.500k.lt.700k) <- c("output_index", "output.spent.block_height")
+  setDT(master.edgelist.output.spent.gt.500k.lt.700k)
+  
+  rm(master.edgelist.gt.500k.lt.700k)
+  
+  
+  master.edgelist.gt.700k <- DBI::dbGetQuery(con, 
+    "SELECT origin_index, destination_index,block_height,value FROM edgelist_intermediate_2 WHERE block_height > 699999")
+  
+  master.edgelist.output.created.gt.700k <- master.edgelist.gt.700k[
+    (! is.na(master.edgelist.gt.700k$value) & master.edgelist.gt.700k$value > 0 ), c("destination_index", "block_height")]
+  colnames(master.edgelist.output.created.gt.700k) <- c("output_index", "output.created.block_height")
+  setDT(master.edgelist.output.created.gt.700k)
+  
+  master.edgelist.output.spent.gt.700k <- master.edgelist.gt.700k[, c("origin_index", "block_height")]
+  colnames(master.edgelist.output.spent.gt.700k) <- c("output_index", "output.spent.block_height")
+  setDT(master.edgelist.output.spent.gt.700k)
+  
+  rm(master.edgelist.gt.700k)
+  
+  
+  master.edgelist.output.created <- rbindlist(list(master.edgelist.output.created.lt.500k, 
+    master.edgelist.output.created.gt.500k.lt.700k, master.edgelist.output.created.gt.700k))
+  
+  master.edgelist.output.spent.lt.500k <- merge(master.edgelist.output.created, master.edgelist.output.spent.lt.500k)
+  master.edgelist.output.spent.gt.500k.lt.700k <- merge(master.edgelist.output.created, master.edgelist.output.spent.gt.500k.lt.700k)
+  master.edgelist.output.spent.gt.700k <- merge(master.edgelist.output.created, master.edgelist.output.spent.gt.700k)
+  
+  master.edgelist.output.spent <- rbindlist(list(master.edgelist.output.spent.lt.500k, 
+    master.edgelist.output.spent.gt.500k.lt.700k, master.edgelist.output.spent.gt.700k))
+  
+  rm(master.edgelist.output.created)
+  
+}
 
 
 
@@ -69,5 +138,6 @@ master.edgelist.output.spent <- merge(master.edgelist.output.spent,
 
 saveRDS(master.edgelist.output.spent, paste0(data.dir, "master_edgelist_output_spent.rds"))
 
+saveRDS(master.edgelist.output.spent, paste0(data.dir, "master_edgelist_output_spent-uncompressed.rds"), compress = FALSE)