Incompatible lengths error while trying to load data in HDB

Question

I have created a sample quote keyed table in KDB , keyed on fields ( time and sym). I am trying to save it in HDB using the function .Q.dpft[`:\mydir;.z.d;`sym;`quotetbl] which gives me a length error. `(incompatible lengths ( different lengths of operands for synchronised operation or table columns lengths are not same).

I tried to check the number of element in each column in table by count each flip 0!quotetbl by first unkeying table then making a dictionary out of it and then taking the count for each key in dictionary. They are all same.

I tried to run meta quotetbl and it gives me attributes like below:-

c         t  f  a
------------------
time      p     s
sym       s
bid       f
ask       f
loc       s
bidsize   j
asksize   j

In the error trap mode when I try and run .Q.bt and .Q.trp command I get the below

 q)) .Q.bt
 k) {1'pl'(2*4<|/#:'v)_v:1_btx L1`;}

 q)) .Q.trp
 k) {-105!(x;,y;z)}